ringed vs doughnut-shaped

ringed and doughnut-shaped both are adjectives.

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

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

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

ringed (adjective)	doughnut-shaped (adjective)
wearing a wedding ring; lawfully married	shaped like a ring
having colored rings around the body
shaped like a ring