/ Thesaurus / O Synonyms of organic fertiliser Find synonyms for: Noun1. organic, organic fertilizer, organic fertiliser, fertilizer, fertiliser, plant foodusage: a fertilizer that is derived from animal or vegetable matterWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language