sing vs peach

sing is not a noun while peach is a noun.

Word	Noun	Adjective	Verb	Adverb
sing	No	No	Yes	No
peach	Yes	No	Yes	No

As verbs, sing and peach are synonyms defined as:

sing (noun)	peach (noun)
	a shade of pink tinged with yellow
	downy juicy fruit with sweet yellowish or whitish flesh
	a very attractive or seductive looking woman
	cultivated in temperate regions

sing (verb)	peach (verb)
make a whining, ringing, or whistling sound	divulge confidential information or secrets
divulge confidential information or secrets
to make melodious sounds
produce tones with the voice
deliver by singing