The word separate is a verb. The past tense is separated.
adjective
In the sentence "Some buildings have separate classrooms," the word "separate" is used as an adjective to describe the classrooms.
the part of speech for city-state would be a noun
A corner kick (two separate words) is a noun. It is a term used in football (soccer).
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.