peachy vs cracking

peachy is not a noun while cracking is a noun.

Word	Noun	Adjective	Verb	Adverb
peachy	No	Yes	No	No
cracking	Yes	Yes	No	No

As adjectives, peachy and cracking are synonyms defined as:

Other synonyms of peachy include bang-up, bully, corking, dandy, great, groovy, keen, neat, nifty, not bad, old, slap-up, smashing, swell.

peachy (noun)	cracking (noun)
	the act of cracking something
	a sudden sharp noise
	the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process)

peachy (adjective)	cracking (adjective)
of something resembling a peach in color	excellent
excellent