mender vs darner

mender and darner both are nouns.

Word	Noun	Adjective	Verb	Adverb
mender	Yes	No	No	No
darner	Yes	No	No	No

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

Other hyponyms of mender include maintenance man, repairman, service man.

mender (noun)	darner (noun)
a skilled worker who mends or repairs things	a person who mends by darning