/ Thesaurus / T Synonyms of to boot Find synonyms for: Adverb1. additionally, to bootusage: in addition, by way of addition; furthermore; "he serves additionally as the CEO"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language