Word Forms of "thorough" (8 forms)

Adjective

Form	Word
Alternative, Informal	thoro
Comparative	more thorough
Comparative	thorougher
Superlative	most thorough
Superlative	thoroughest

Alternative, Informalthoro

Comparativemore thorough

Comparativethorougher

Superlativemost thorough

Superlativethoroughest

Noun

Form	Word
Alternative, Informal	thoro
Plural	thoroughs

Alternative, Informalthoro

Pluralthoroughs

Preposition

Form	Word
Alternative, Informal	thoro

Alternative, Informalthoro

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