naming vs acrophony

naming and acrophony both are nouns.

Word	Noun	Adjective	Verb	Adverb
naming	Yes	Yes	No	No
acrophony	Yes	No	No	No

As nouns, acrophony is a hyponym of naming; that is, acrophony is a word with a more specific, narrower meaning than naming:

naming: the verbal act of naming
acrophony: naming a letter of the alphabet by using a word whose initial sound is the sound represented by that letter

Other hyponyms of naming include numeration, denotation, indication, specification.

naming (noun)	acrophony (noun)
the act of putting a person into a non-elective position	naming a letter of the alphabet by using a word whose initial sound is the sound represented by that letter
the verbal act of naming

naming (adjective)	acrophony (adjective)
inclined to or serving for the giving of names