acousticophobia vs phonophobia

acousticophobia and phonophobia both are nouns.

Word	Noun	Adjective	Verb	Adverb
acousticophobia	Yes	No	No	No
phonophobia	Yes	No	No	No

As nouns, acousticophobia and phonophobia are synonyms defined as:

acousticophobia and phonophobia: a morbid fear of sounds including your own voice

acousticophobia (noun)	phonophobia (noun)
a morbid fear of sounds including your own voice	a morbid fear of sounds including your own voice