circinate vs doughnut-shaped

circinate and doughnut-shaped both are adjectives.

Word	Noun	Adjective	Verb	Adverb
circinate	No	Yes	No	No
doughnut-shaped	No	Yes	No	No

As adjectives, circinate and doughnut-shaped are synonyms defined as:

Other synonyms of circinate include annular, annulate, annulated, ring-shaped, ringed.

circinate (adjective)	doughnut-shaped (adjective)
shaped like a ring	shaped like a ring