Word | Noun | Adjective | Verb | Adverb |
---|---|---|---|---|
undercover | No | Yes | No | No |
underground | Yes | Yes | No | Yes |
undercover (noun) | underground (noun) |
---|---|
an electric railway operating below the surface of the ground (usually in a city) | |
a secret group organized to overthrow a government or occupation force |
undercover (adjective) | underground (adjective) |
---|---|
conducted with or marked by hidden aims or methods | conducted with or marked by hidden aims or methods |
under the level of the ground |
undercover (adverb) | underground (adverb) |
---|---|
beneath the surface of the earth | |
in or into hiding or secret operation |