ritual dance vs terpsichore

ritual dance and terpsichore both are nouns.

Word	Noun	Adjective	Verb	Adverb
ritual dance	Yes	No	No	No
terpsichore	Yes	No	No	No

As nouns, terpsichore is a hypernym of ritual dance; that is, terpsichore is a word with a broader meaning than ritual dance:

ritual dance: a dance that is part of a religious ritual
terpsichore: taking a series of rhythmical steps (and movements) in time to music

Other hypernyms of ritual dance include dance, dancing, saltation.

ritual dance (noun)	terpsichore (noun)
a dance that is part of a religious ritual	taking a series of rhythmical steps (and movements) in time to music