coolest

As a noun terms

is .

As an adjective coolest is

(cool).

As adjectives the difference between coldest and coolest

is that coldest is (cold) while coolest is (cool).

As adjectives the difference between cooler and coolest

is that cooler is comparative of cool while coolest is superlative of cool.

As a noun cooler

is anything which cools.

As adjectives the difference between coolest and cool

is that coolest is superlative of cool while cool is having a slightly low temperature; mildly or pleasantly cold.

As a noun cool is

a moderate or refreshing state of cold; moderate temperature of the air between hot and cold; coolness.

As a verb cool is

to lose heat, to get colder.

As an acronym COOL is

CLIPS Object-Oriented Language