wisest, tallest, greatest...
The -est is a giveaway.
fewer - comparative & fewest - superlative
positive degree=few comparative degree=fewer superlative degree=fewest
"Higher" is the comparative of high. The superlative is highest.
lazier and laziest
fewer, fewest
fewer, fewest
fewer, fewest
fewer, fewest
harmful
last
'Next' is a superlative; it means 'nearest'. The positive is therefore 'near' and the comparative is 'nearer'.
comparative = cleverer or more clever superlative = cleverest or most clever Clever is one of a few adjectives that has both forms for comparative and superlative.