underground
WordReference English Thesaurus © 2025
Sense: Adjective: subterranean
Synonyms:
subterranean, belowground , below-ground , buried, subsurface
Sense: Adjective: secret
Synonyms:
secret Collocations, undercover, covert, stealthy, stealth Collocations, clandestine, hush-hush, cloak-and-dagger, hidden Collocations, top secret, secretive, furtive, secluded Collocations
Sense: Adjective: avant-garde
Synonyms:
avant-garde, unconventional, alternative Collocations, experimental, radical, unorthodox, groundbreaking Collocations, innovative Collocations, subversive, counter-culture
Sense: Noun: resistance
Synonyms:
resistance Collocations, rebels, counter-culture, radicals, seditionists, freedom fighters, resistance movement, underground movement, guerrillas, Maquis
Sense: Noun: subway - UK
Synonyms:
subway Collocations , Tube Collocations , metro, underground train, Tube train , London Underground , subway train , New York subway
Sense: Adverb: below ground
Synonyms:
under the ground, below ground, below the surface, beneath the surface, beneath your feet, down below, under the soil, under the sod, in the earth, three feet under, below Collocations
Sense: Adverb: into hiding
Synonyms:
into hiding, undercover, into the shadows, out of sight