Words that end with IUM, grouped by length
- archaebacterium
- corynebacterium
- cryptosporidium
- enterobacterium
- macrosporangium
- microsporangium
- tetrasporangium
- chondrocranium
- clavicytherium
- conservatorium
- cyanobacterium
- disciplinarium
- disequilibrium
- megasporangium
- nitrobacterium
- nonequilibrium
- radiostrontium
- sceuophylacium
- spermatogonium
- acaridomatium
- acarodomatium
- actinouranium
- amphigastrium
- anticlinorium
- armamentarium
- decamethonium
- evangeliarium
- ferrochromium
- hexamethonium
- hypochondrium
- inclinatorium
- lectisternium
- mycobacterium
- perichondrium
- platiniridium
- protoactinium
- pycnoconidium
- rutherfordium
- scolopendrium
- succinctorium
- vibracularium
- vivisectorium
- zoosporangium
- amphithecium
- androclinium
- appressorium
- archesporium
- bimillennium
- cladosporium
- cuprammonium
- deinotherium
- dolphinarium
- duraluminium
- epithalamium
- hypogastrium
- inhalatorium
- kurchatovium
- leontopodium
- mesogastrium
- mycodomatium
- pandaemonium
- panhellenium
- perichaetium
- perinephrium
- perionychium
- periselenium
- pleiochasium
- postliminium
- praseodymium
- progymnasium
- protactinium
- prothalamium
- pseudopodium
- quadriennium
- quinquennium
- radiothorium
- spermagonium
- spermogonium
- superpremium
- suspensorium
- synclinorium
- transuranium
- unguentarium
- unnilpentium
- unnilquadium
- unnilseptium
- verticillium
- antependium
- antheridium
- apodyterium
- archegonium
- aspersorium
- californium
- capillitium
- carpogonium
- cassiopeium
- clinandrium
- clostridium
- columbarium
- condominium
- crematorium
- cypripedium
- diascordium
- dinotherium
- einsteinium
- endocardium
- endocranium
- endometrium
- endoneurium
- endothecium
- endothelium
- epigastrium
- equilibrium
- erythronium
- eubacterium
- florilegium
- formicarium
- frigidarium
- gametangium
- gynostemium
- hesperidium
- hormogonium
- hydroxonium
- insectarium
- intermedium
- ipratropium
- latifundium
- latrocinium
- leprosarium
- lubritorium
- maggotorium
- magisterium
- mendelevium
- mesothelium
- mesothorium
- ministerium
- monochasium
- muscatorium
- nototherium
- ophidiarium
- ostensorium
- pandemonium
- paramaecium
- paramoecium
- parascenium
- pelargonium
- penicillium
- pericardium
- pericranium
- peridesmium
- perineurium
- perithecium
- phosphonium
- planetarium
- polychasium
- polyzoarium
- positronium
- postscenium
- promycelium
- prothallium
- quadrennium
- satellitium
- scriptorium
- sericterium
- sphaeridium
- sporogonium
- staminodium
- stylopodium
- subdelirium
- syllabarium
- taurobolium
- termitarium
- tetrazolium
- tridominium
- unnilhexium
- xenodochium
- zoodendrium
- zoogonidium
- zoospermium
- acroterium
- anacardium
- anaerobium
- androecium
- apothecium
- ascogonium
- atracurium
- auditorium
- cafetorium
- charmonium
- chromidium
- cinerarium
- colloquium
- compendium
- compluvium
- consortium
- delphinium
- dendrobium
- desiderium
- digitorium
- dysprosium
- embothrium
- epicardium
- epicranium
- epineurium
- epithelium
- eponychium
- eupatorium
- euphorbium
- exosporium
- filopodium
- fumatorium
- gadolinium
- glochidium
- gnaphalium
- haustorium
- honorarium
- horologium
- hypanthium
- iridosmium
- lawrencium
- lenocinium
- lycopodium
- meitnerium
- millennium
- miracidium
- monopodium
- monosodium
- moratorium
- myocardium
- nasturtium
- natatorium
- nephridium
- oceanarium
- ommatidium
- opprobrium
- osmeterium
- osmiridium
- panaritium
- pancratium
- paramecium
- parapodium
- peridinium
- perigonium
- perimysium
- phyllodium
- plasmodium
- polemonium
- polyparium
- praeludium
- praesidium
- praetorium
- primordium
- principium
- procambium
- promethium
- proscenium
- prostomium
- psalterium
- puerperium
- quadrivium
- sanatorium
- sanitarium
- sanitorium
- sclerotium
- seaborgium
- seaquarium
- septennium
- sestertium
- sparganium
- spermarium
- spermatium
- sporangium
- stichidium
- stramonium
- subsellium
- sudatorium
- sulphonium
- synandrium
- technetium
- tepidarium
- tirocinium
- triclinium
- vomitorium
- zoothecium
- achaenium
- aluminium
- americium
- anthodium
- anthurium
- arbitrium
- asplenium
- bacterium
- berkelium
- beryllium
- bronchium
- caldarium
- calvarium
- carbonium
- cerastium
- coccidium
- coenobium
- collegium
- collodium
- colluvium
- collyrium
- columbium
- contagium
- cormidium
- criterium
- ctenidium
- cymbidium
- decennium
- deliquium
- dentalium
- desmodium
- deuterium
- diacodium
- diazonium
- dichasium
- drepanium
- ectropium
- effluvium
- elaterium
- encolpium
- entropium
- epicedium
- epilobium
- epimysium
- euphonium
- excambium
- fastigium
- gelsemium
- germanium
- glucinium
- gymnasium
- gynaecium
- gynoecium
- harmonium
- helvetium
- herbarium
- hieracium
- hospitium
- hydronium
- impluvium
- magnalium
- magnesium
- manubrium
- marsupium
- martyrium
- mazaedium
- nelumbium
- neodymium
- neptunium
- palladium
- pastorium
- plutonium
- pollinium
- pomoerium
- potassium
- presidium
- prooemium
- pterygium
- purdonium
- pycnidium
- reptilium
- rhipidium
- rhizobium
- ruthenium
- sacrarium
- sensorium
- septarium
- sporidium
- strontium
- sulfonium
- sympodium
- symposium
- synangium
- syncytium
- synedrium
- tellurium
- tentorium
- terrarium
- trapezium
- triennium
- trifolium
- triforium
- tripudium
- trisodium
- unununium
- uredinium
- uropygium
- vaccinium
- vestigium
- virginium
- ytterbium
- zirconium
- zoocytium
- achenium
- actinium
- aecidium
- aerobium
- allodium
- alluvium
- ammonium
- apterium
- aquarium
- ascidium
- aspidium
- basidium
- bdellium
- biennium
- bothrium
- brachium
- caladium
- chromium
- ciborium
- conarium
- conidium
- coremium
- coronium
- cyathium
- cymatium
- delirium
- didymium
- diluvium
- disodium
- domatium
- dominium
- emporium
- encomium
- eryngium
- eulogium
- europium
- exordium
- francium
- fusarium
- geranium
- gonidium
- graphium
- gynecium
- helenium
- hymenium
- illinium
- illuvium
- imperium
- indicium
- indusium
- ingenium
- lixivium
- lutecium
- lutetium
- masurium
- meconium
- motorium
- mycelium
- nebulium
- nobelium
- oncidium
- onychium
- oogonium
- opsonium
- ordalium
- ossarium
- patagium
- peculium
- peponium
- peridium
- phormium
- polonium
- proprium
- psyllium
- puparium
- pygidium
- pyxidium
- ranarium
- refugium
- rosarium
- rubidium
- samarium
- scandium
- scholium
- sedilium
- selenium
- silicium
- silphium
- simulium
- solarium
- solatium
- soredium
- splenium
- sudarium
- syconium
- thallium
- titanium
- trillium
- ununbium
- vanadium
- velarium
- venidium
- vivarium
- zooecium
- alodium
- alumium
- ballium
- bohrium
- cadmium
- caesium
- calcium
- cambium
- cranium
- dubnium
- elogium
- eluvium
- erodium
- exuvium
- fermium
- gallium
- hafnium
- hahnium
- hassium
- holmium
- iridium
- ischium
- lithium
- muonium
- natrium
- niobium
- orarium
- oxonium
- pallium
- plagium
- premium
- protium
- pythium
- rhenium
- rhodium
- spodium
- stadium
- stibium
- stomium
- taedium
- terbium
- tertium
- thorium
- thulium
- tritium
- trivium
- uranium
- uredium
- yttrium
- zoarium
- zoecium
- aecium
- allium
- atrium
- barium
- bivium
- cerium
- cesium
- cilium
- conium
- corium
- curium
- dolium
- echium
- erbium
- folium
- gonium
- helium
- indium
- ionium
- kalium
- labium
- lolium
- medium
- milium
- minium
- oidium
- omnium
- osmium
- ostium
- podium
- radium
- sepium
- sodium
- tedium
- telium
- tomium
- xenium
- ilium
- odium
- onium
- opium
- pium