/ Thesaurus / F Synonyms of fertilise Find synonyms for: Verb1. fertilize, fecundate, fertilise, change, alter, modifyusage: make fertile or productive; "The course fertilized her imagination"2. fertilize, fertilise, feed, enrichusage: provide with fertilizers or add nutrients to; "We should fertilize soil if we want to grow healthy plants"3. inseminate, fecundate, fertilize, fertilise, change, alter, modifyusage: introduce semen into (a female)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language