unhearable vs unsounded

unhearable and unsounded both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unhearable	No	Yes	No	No
unsounded	No	Yes	No	No

unhearable (adjective)	unsounded (adjective)
impossible to hear; imperceptible by the ear	situated at or extending to great depth; too deep to have been sounded or plumbed
	not made to sound