silent vs unsounded

silent and unsounded both are adjectives.

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

As adjectives, silent and unsounded are synonyms defined as:

silent (adjective)	unsounded (adjective)
implied by or inferred from actions or statements	situated at or extending to great depth; too deep to have been sounded or plumbed
unable to speak because of hereditary deafness	not made to sound
having a frequency below or above the range of human audibility
marked by absence of sound
failing to speak or communicate etc when expected to
not made to sound
expressed without speech