UndergroundWordNet Explorer
Explore synonyms, antonyms, hypernyms, hyponyms, and semantic relationships for “underground” powered by Princeton WordNet.
adjective
conducted with or marked by hidden aims or methods
Words in this synset: clandestine, cloak-and-dagger, hole-and-corner(a), hugger-mugger, hush-hush, secret, surreptitious, undercover
adjective
secret or hidden; not openly practiced or engaged in or shown or avowed
adjective
under the level of the ground
Words in this synset: belowground
adjective
beneath the surface
noun
an electric railway operating below the surface of the ground (usually in a city)
noun
line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight
noun
a secret group organized to overthrow a government or occupation force
Words in this synset: resistance
noun
a political unit organized to promote revolution