soft vs soft-spoken

soft and soft-spoken both are adjectives.

Word	Noun	Adjective	Verb	Adverb
soft	No	Yes	No	Yes
soft-spoken	No	Yes	No	No

soft (adjective)	soft-spoken (adjective)
produced with vibration of the vocal cords	having a speaking manner that is not loud or harsh
yielding readily to pressure or weight
compassionate and kind; conciliatory
(of speech sounds); produced with the back of the tongue raised toward the hard palate; characterized by a hissing or hushing sound (as `s' and `sh')
(of sound) relatively low in volume
(of light) transmitted from a broad light source or reflected
not protected against attack (especially by nuclear weapons)
(used chiefly as a direction or description in music) soft; in a quiet, subdued tone
mild and pleasant
willing to negotiate and compromise
not brilliant or glaring
not burdensome or demanding; borne or done easily and without hardship
(of a commodity or market or currency) falling or likely to fall in value
having little impact
soft and mild; not harsh or stern or severe
tolerant or lenient
using evidence not readily amenable to experimental verification or refutation
easily hurt
out of condition; not strong or robust; incapable of exertion or endurance

soft (adverb)	soft-spoken (adverb)
in a relaxed manner; or without hardship