unhearable vs silent

unhearable and silent both are adjectives.

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

unhearable (adjective)	silent (adjective)
impossible to hear; imperceptible by the ear	implied by or inferred from actions or statements
	unable to speak because of hereditary deafness
	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