silent vs unspoken

silent and unspoken both are adjectives.

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

As adjectives, silent and unspoken are synonyms defined as:

Other synonyms of silent include mute, tongueless, wordless.

silent (adjective)	unspoken (adjective)
implied by or inferred from actions or statements	not made explicit
unable to speak because of hereditary deafness	expressed without speech
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