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underground vs railroad line

railroad line vs underground

underground and railroad line both are nouns.

underground is an adjective but railroad line is not an adjective.

underground is an adverb but railroad line is not an adverb.

Word NounAdjectiveVerbAdverb
underground Yes Yes No Yes
railroad line Yes No No No
As nouns, railroad line is a hypernym of underground; that is, railroad line is a word with a broader meaning than underground:
  • underground: an electric railway operating below the surface of the ground (usually in a city)
  • railroad line: line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight
Other hypernyms of underground include railroad, railway, railway line, railway system.
underground (noun) railroad line (noun)
an electric railway operating below the surface of the ground (usually in a city) line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight
a secret group organized to overthrow a government or occupation force
underground (adjective) railroad line (adjective)
conducted with or marked by hidden aims or methods
under the level of the ground
underground (adverb) railroad line (adverb)
beneath the surface of the earth
in or into hiding or secret operation
Difference between underground and railroad line

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