Underground

//ˌʌndəˈɡɹaʊnd//

Word Type

Noun

Adjective

Verb

Adverb

Adverb

Adjective

Proper Noun

The word "underground" can be used as noun, adjective, verb, adverb, adverb, adjective and proper noun.

Word Relationships

Derived Terms

Underground Railroad Weather Underground deep underground military base underground handball underground handpass underground mutton underground people underground railway

Derived From

Context

british rail transport uk

Broader Terms (Hypernyms)

railroad railroad line railway railway line railway system revolutionary group

Type Of (IsA)

book localized spatial thing revolutionary group

Related Terms

Overground go underground underground railway

Related Terms

go underground london underground underground railway

Similar Terms

covert subsurface

Synonym Network

avant garde belowground cloak and dagger hidden hush hush metro resistance subterranean subway tube unconventional underground railway

More for "underground"

Meaning Synonyms Word Forms Antonyms

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.