profoundly deaf vs unhearing

profoundly deaf and unhearing both are adjectives.

Word	Noun	Adjective	Verb	Adverb
profoundly deaf	No	Yes	No	No
unhearing	No	Yes	No	No

As adjectives, profoundly deaf and unhearing are synonyms defined as:

Other synonyms of profoundly deaf include deaf as a post, stone-deaf.

profoundly deaf (adjective)	unhearing (adjective)
totally deaf; unable to hear anything	totally deaf; unable to hear anything