stone-deaf vs unhearing

stone-deaf and unhearing both are adjectives.

Word	Noun	Adjective	Verb	Adverb
stone-deaf	No	Yes	No	No
unhearing	No	Yes	No	No

As adjectives, stone-deaf and unhearing are synonyms defined as:

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

stone-deaf (adjective)	unhearing (adjective)
totally deaf; unable to hear anything	totally deaf; unable to hear anything