Word Forms of "underground" (14 forms)

Adjective

Form	Word
Alternative, Uncommon	under ground
Comparative	more underground
Superlative	most underground

Alternative, Uncommonunder ground

Comparativemore underground

Superlativemost underground

Adverb

Form	Word
Alternative, Uncommon	under ground
Comparative	more underground
Superlative	most underground

Alternative, Uncommonunder ground

Comparativemore underground

Superlativemost underground

Proper Noun

Form	Word
Canonical	the Underground

Canonicalthe Underground

Noun

Form	Word
Alternative, Uncommon	under ground
Plural	undergrounds

Alternative, Uncommonunder ground

Pluralundergrounds

Verb

Form	Word
Alternative, Uncommon	under ground
Participle, Past	undergrounded
Participle, Present	undergrounding
Past	undergrounded
Present, Singular, Third-Person	undergrounds

Alternative, Uncommonunder ground

Participle, Pastundergrounded

Participle, Presentundergrounding

Pastundergrounded

Present, Singular, Third-Personundergrounds

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