epicycloid vs line roulette

epicycloid and line roulette both are nouns.

Word	Noun	Adjective	Verb	Adverb
epicycloid	Yes	No	No	No
line roulette	Yes	No	No	No

As nouns, line roulette is a hypernym of epicycloid; that is, line roulette is a word with a broader meaning than epicycloid:

epicycloid: a line generated by a point on a circle rolling around another circle
line roulette: a line generated by a point on one figure rolling around a second figure

Other hypernyms of epicycloid include roulette.

epicycloid (noun)	line roulette (noun)
a line generated by a point on a circle rolling around another circle	a line generated by a point on one figure rolling around a second figure