feat vs tour de force

feat and tour de force both are nouns.

Word	Noun	Adjective	Verb	Adverb
feat	Yes	No	No	No
tour de force	Yes	No	No	No

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

Other hyponyms of feat include derring-do, hit, rally, rallying, stunt.

feat (noun)	tour de force (noun)
a notable achievement	a masterly or brilliant feat