soft vs pianissimo assai

soft and pianissimo assai both are adjectives.

Word	Noun	Adjective	Verb	Adverb
soft	No	Yes	No	Yes
pianissimo assai	No	Yes	No	No

soft (adjective)	pianissimo assai (adjective)
produced with vibration of the vocal cords	(chiefly a direction or description in music) very soft
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)	pianissimo assai (adverb)
in a relaxed manner; or without hardship