/ Thesaurus / S Synonyms of shoestring fungus Find synonyms for: Noun1. shoestring fungus, agaricusage: any of several fungi of the genus Armillaria that form brown stringy rhizomorphs and cause destructive rot of the roots of some trees such as apples or maplesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language