imperative verb vs verb

imperative verb and verb both are nouns.

Word	Noun	Adjective	Verb	Adverb
imperative verb	Yes	No	No	No
verb	Yes	No	No	No

As nouns, verb is a hypernym of imperative verb; that is, verb is a word with a broader meaning than imperative verb:

imperative verb: a verb in the imperative mood.
verb: a content word that denotes an action, occurrence, or state of existence

imperative verb (noun)	verb (noun)
a verb in the imperative mood.	a content word that denotes an action, occurrence, or state of existence
	the word class that serves as the predicate of a sentence