high-pitched vs soprano

high-pitched is not a noun while soprano is a noun.

Word	Noun	Adjective	Verb	Adverb
high-pitched	No	Yes	No	No
soprano	Yes	Yes	No	No

high-pitched (noun)	soprano (noun)
	the pitch range of the highest female voice
	the highest female voice; the voice of a boy before puberty
	a female singer with the highest vocal range of all the voice type

high-pitched (adjective)	soprano (adjective)
used of sounds and voices; high in pitch or frequency	having or denoting a high range
set at a sharp or high angle or slant