fortissimo vs pianissimo

fortissimo and pianissimo both are nouns.

Word	Noun	Adjective	Verb	Adverb
fortissimo	Yes	Yes	No	Yes
pianissimo	Yes	Yes	No	Yes

fortissimo (noun)	pianissimo (noun)
a musical composition or musical passage to be performed very loudly	(music) low loudness

fortissimo (adjective)	pianissimo (adjective)
(chiefly a direction or description in music) very loud and strong	(chiefly a direction or description in music) very soft

fortissimo (adverb)	pianissimo (adverb)
a direction in music; to be played very loudly	a direction in music; to be played very softly