- abbreviation23
- abdication18
- abduction18
- aberration14
- abjection25
- abjuration24
- ablation13
- ablution14
- abnegation17
- abolition14
- abomination19
- abortion12
- abreaction17
- abrogation16
- abruption17
- absolution16
- absorption17
- abstention15
- abstraction18
- acceleration20
- accentuation21
- acceptation21
- acclamation22
- acclimation22
- acclimatization35
- accommodation27
- accreditation21
- accretion16
- acculturation23
- accumulation25
- accusation18
- accustomation24
- acetification23
- acetylation18
- acidification24
- acidulation18
- acquisition25
- action10
- activation18
- actualization28
- actuation14
- acylation16
- adaptation15
- adaption13
- addiction15
- addition11
- adduction16
- adjudication28
- adjunction26
- adjuration22
- administration20
- admiration15
- admonition16
- adnation11
- adoption13
- adoration11
- adsorption15
- adulation13
- adulteration16
- adumbration20
- advection18
- advocation19
- aeration9
- aerosolization25
- aestivation16
- affectation21
- affection19
- affiliation19
- affirmation21
- affixation24
- affliction21
- afforestation20
- agglomeration22
- agglutination21
- aggradation17
- aggravation20
- aggregation18
- agitation12
- agnation12
- alation9
- aldolization25
- alienation13
- alimentation18
- alkalinization31
- alkylation19
- allegation15
- allegorization28
- alleviation18
- alliteration15
- allocation16
- allocution17
- alphabetization34
- alteration12
- altercation16
- alternation14
- amalgamation22
- ambition15
- ambulation19
- amelioration17
- ammoniation19