noun
Issues is a noun (plural form of issue) and a verb (third person singular conjugation of issue).
It seems there is a typo in your question. If you meant to ask about the word "problem" as a part of speech, it is a noun that represents an issue, difficulty, or situation that needs to be resolved.
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "breezy" is an adjective.