Grace vs Euphrosyne

Grace and Euphrosyne both are nouns.

Word	Noun	Adjective	Verb	Adverb
Grace	Yes	No	No	No
Euphrosyne	Yes	No	No	No

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

Grace: (Greek mythology) one of three sisters who were the givers of beauty and charm; a favorite subject for sculptors
Euphrosyne: (Greek mythology) one of the three Graces; the one who brings joy

Other hyponyms of Grace include Aglaia, Thalia.

Grace (noun)	Euphrosyne (noun)
(Greek mythology) one of three sisters who were the givers of beauty and charm; a favorite subject for sculptors	(Greek mythology) one of the three Graces; the one who brings joy