The word "beautician" uses 10 letters: aabceiintu.
beautician is a valid word in this word list. For a definition, see the external dictionary links below.
Try a search for beautician in these online resources (some words may not be found):
Wiktionary - OneLook Dictionaries - Merriam-Webster - Google Search
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Words formed by adding one letter before or after beautician (in bold), or to aabceiintu in any order:
s - beauticians
Shorter words found within beautician