feat vs rallying

feat and rallying both are nouns.

Word	Noun	Adjective	Verb	Adverb
feat	Yes	No	No	No
rallying	Yes	Yes	No	No

As nouns, rallying is a hyponym of feat; that is, rallying is a word with a more specific, narrower meaning than feat:

Other hyponyms of feat include derring-do, hit, rally, stunt, tour de force.

feat (noun)	rallying (noun)
a notable achievement	the act of mobilizing for a common purpose
	the feat of mustering strength for a renewed effort

feat (adjective)	rallying (adjective)
	rousing or recalling to unity and renewed effort