silent vs dumb

silent and dumb both are adjectives.

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

As adjectives, silent and dumb are synonyms defined as:

Other synonyms of silent include mute.

silent (adjective)	dumb (adjective)
implied by or inferred from actions or statements	slow to learn or understand; lacking intellectual acuity
unable to speak because of hereditary deafness	unable to speak because of hereditary deafness
having a frequency below or above the range of human audibility	temporarily incapable of speaking
marked by absence of sound	lacking the power of human speech
failing to speak or communicate etc when expected to
not made to sound
expressed without speech