/ Thesaurus / P Synonyms of perpendicularly Find synonyms for: Adverb1. sheer, perpendicularlyusage: straight up or down without a break2. perpendicularlyusage: in a perpendicular manner; "this red line runs perpendicularly to the green line"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language