The part of speech for "key" depends on how it is used. See the examples below.
Do you have a key to our house? (key = noun)
Please summarize the key ideas. (key = adjective)
He was very angry, but I don't think he'd key the side of my car. (key = verb)
The part of speech for "answer" is a noun.
Adventure Camp - 2003 Keys to the Keys Part I 2-13 was released on: USA: 2008
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
adverb
what part of speech is work
No it is a city in Broward County in southern Florida but not a part of the Keys.
The Keys.
Adventure Camp - 2003 Keys to the Keys Part II 2-14 was released on: USA: 2008
The part of speech for "unfamiliar" is an adjective.
The part of speech for "explicit" is an adjective.