Grace vs Thalia

Grace and Thalia both are nouns.

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

As nouns, Thalia is a hyponym of Grace; that is, Thalia 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
Thalia: (Greek mythology) one of the three Graces; the one who blossoms

Other hyponyms of Grace include Aglaia, Euphrosyne.

Grace (noun)	Thalia (noun)
(Greek mythology) one of three sisters who were the givers of beauty and charm; a favorite subject for sculptors	(Greek mythology) the Muse of comedy and pastoral poetry
	(Greek mythology) one of the three Graces; the one who blossoms