less vs more

less and more both are adjectives.

Word	Noun	Adjective	Verb	Adverb
less	No	Yes	No	Yes
more	No	Yes	No	Yes

less (adjective)	more (adjective)
(comparative of `little' usually used with mass nouns) a quantifier meaning not as great in amount or degree	(comparative of `much' used with mass nouns) a quantifier meaning greater in size or amount or extent or degree; above; more than
(nonstandard in some uses but often idiomatic with measure phrases) fewer	(comparative of `many' used with count nouns) quantifier meaning greater in number
(usually preceded by `no') lower in quality

less (adverb)	more (adverb)
used to form the comparative of some adjectives and adverbs, indicates that the adjective or adverb is less of something	used to form the comparative of some adjectives and adverbs, indicates that the adjective or adverb is more of something
comparative of little	comparative of much; to a greater degree or extent