Synonyms for

Underground

Adjective / ˈʌndɜ:ˌgraʊnd / Another word for underground — explore alternatives below. For syllable breakdowns and pronunciation, see this word on Syllablesworld.

Definition

beneath the surface of the earth; in or into hiding or secret operation

Synonyms & similar words

subway tube secret undercover resistance surreptitious clandestine metro belowground subterranean belowground underneath buried secret hidden covert clandestine submerged sunken concealed undercover black furtive surreptitious stealthy unseen unobtrusive unnoted unremarked

Synonyms by register

Formal

subterranean subsurface buried

Informal

under down low below

Literary

nether abyssal

Antonyms

above surface overground visible exposed open

Common collocations

  • underground movement
  • underground railway
  • underground parking
  • underground economy
  • underground resistance
  • underground water
  • underground mine

Word family

noun underground
adjective underground
adverb underground

Usage note

As an adjective, 'underground' often refers to something hidden or operating outside of official channels, such as an 'underground movement'. As a noun, it can refer to a literal subterranean space or system.

Compare "underground" with another word →

Example sentences

  1. The mole lives underground.
  2. The thieves were hiding underground.
  3. The city built an underground parking garage.
  4. The subway runs underground.
  5. The rebels had an underground network.

Quotes

  • I like working underground. It's a nice place to hide. - Tom Sizemore
  • The underground is a sign of life. - Edvard Munch
  • The underground is a different world. - Jhene Aiko

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