fewer vs more

fewer and more both are adjectives.

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

fewer (adjective)	more (adjective)
(comparative of `few' used with count nouns) quantifier meaning a smaller number of	(comparative of `much' used with mass nouns) a quantifier meaning greater in size or amount or extent or degree; above; more than
	(comparative of `many' used with count nouns) quantifier meaning greater in number

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