Breadcrumb Home > Thesaurus > F Synonyms of firefly Find synonyms for: Noun 1. firefly, fire beetle, Pyrophorus noctiluca, elaterid beetle, elater, elaterid usage: tropical American click beetle having bright luminous spots 2. firefly, lightning bug, beetle usage: nocturnal beetle common in warm regions having luminescent abdominal organs WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of firefly (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. The Book of 1 Corinthians: Summary Current Events This Week: June 2023 Languages Spoken in Each Country of the World Aesop's Fables: Aesop's Fables Milestones in Environmental Protection The 12 Labors of Hercules (In Order) ✖ Related Content Daily Word Quiz: visceral Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language