Elsewhere is an adverb.
Another is a determiner.
The word otherwise is an adverb. It means to do something in a manner that is different.
No, it is not. Elsewhere is an adverb meaning in some other location that the current one, or the specified one.
The word in is sometimes used as a noun, in the context of, I've got an in with the president. This would be considered a colloquial usage.
I cannot think of any way the word 'everywhere' could be used other than as an adverb.
The part of speech for "answer" is a noun.
part of speech
The part of speech for this particular word is a noun.
what part of speech is beneath
what part of speech is work
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech of "came" is a verb.
The part of speech for "buried" is a verb.
The part of speech for "rapid" is an adjective.
The part of speech for "lecturer" is a noun.