phonophobia vs simple phobia

phonophobia and simple phobia both are nouns.

Word	Noun	Adjective	Verb	Adverb
phonophobia	Yes	No	No	No
simple phobia	Yes	No	No	No

As nouns, simple phobia is a hypernym of phonophobia; that is, simple phobia is a word with a broader meaning than phonophobia:

phonophobia: a morbid fear of sounds including your own voice
simple phobia: any phobia (other than agoraphobia) associated with relatively simple well-defined stimuli

phonophobia (noun)	simple phobia (noun)
a morbid fear of sounds including your own voice	any phobia (other than agoraphobia) associated with relatively simple well-defined stimuli