interrogative vs interrogative mood

interrogative and interrogative mood both are nouns.

Word	Noun	Adjective	Verb	Adverb
interrogative	Yes	Yes	No	No
interrogative mood	Yes	No	No	No

As nouns, interrogative and interrogative mood are synonyms defined as:

interrogative and interrogative mood: some linguists consider interrogative sentences to constitute a mood

interrogative (noun)	interrogative mood (noun)
a sentence of inquiry that asks for a reply	some linguists consider interrogative sentences to constitute a mood
some linguists consider interrogative sentences to constitute a mood

interrogative (adjective)	interrogative mood (adjective)
relating to the use of or having the nature of an interrogation
relating to verbs in the so-called interrogative mood