Breadcrumb Home > Thesaurus > F Synonyms of fbi Find synonyms for: Noun 1. Federal Bureau of Investigation, FBI, law enforcement agency usage: a federal law enforcement agency that is the principal investigative arm of the Department of Justice WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of fbi (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: hagiography Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language