Open English Wordnet
Nouns
(n)comparative, comparative degreethe comparative form of an adjective or adverb“‘faster’ is the comparative of the adjective ‘fast’”, “‘less famous’ is the comparative degree of the adjective ‘famous’”, “‘more surely’ is the comparative of the adverb ‘surely’”
Adjectives
(a)comparativerelating to or based on or involving comparison“comparative linguistics”, “the comparative form of an adjective”