interjection vs exclaiming

interjection and exclaiming both are nouns.

Word	Noun	Adjective	Verb	Adverb
interjection	Yes	No	No	No
exclaiming	Yes	No	No	No

As nouns, exclaiming is a hypernym of interjection; that is, exclaiming is a word with a broader meaning than interjection:

Other hypernyms of interjection include exclamation.

interjection (noun)	exclaiming (noun)
the action of interjecting or interposing an action or remark that interrupts	an abrupt excited utterance
an abrupt emphatic exclamation expressing emotion