participial vs verb

participial and verb both are nouns.

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

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

participial: a non-finite form of the verb; in English it is used adjectivally and to form compound tenses
verb: the word class that serves as the predicate of a sentence

participial (noun)	verb (noun)
a non-finite form of the verb; in English it is used adjectivally and to form compound tenses	a content word that denotes an action, occurrence, or state of existence
	the word class that serves as the predicate of a sentence

participial (adjective)	verb (adjective)
of or relating to or consisting of participles