gyre vs round shape

gyre and round shape both are nouns.

Word	Noun	Adjective	Verb	Adverb
gyre	Yes	No	No	No
round shape	Yes	No	No	No

As nouns, round shape is a hypernym of gyre; that is, round shape is a word with a broader meaning than gyre:

gyre: a round shape formed by a series of concentric circles (as formed by leaves or flower petals)
round shape: a shape that is curved and without sharp angles

gyre (noun)	round shape (noun)
a round shape formed by a series of concentric circles (as formed by leaves or flower petals)	a shape that is curved and without sharp angles