most vs fewest

most and fewest both are adjectives.

Word	Noun	Adjective	Verb	Adverb
most	No	Yes	No	Yes
fewest	No	Yes	No	No

most (adjective)	fewest (adjective)
the superlative of `much' that can be used with mass nouns and is usually preceded by `the'; a quantifier meaning the greatest in amount or extent or degree	(superlative of `few' used with count nouns and usually preceded by `the') quantifier meaning the smallest in number
(superlative of `many' used with count nouns and often preceded by `the') quantifier meaning the greatest in number

most (adverb)	fewest (adverb)
used to form the superlative, greatest in size or degree
very
(of actions or states) slightly short of or not quite accomplished; all but