/ Thesaurus / S Synonyms of siphon off Find synonyms for: Verb1. siphon, syphon, siphon off, draw, take outusage: convey, draw off, or empty by or as if by a siphonWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reticent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language