cotyloidal vs cotyloid

cotyloidal and cotyloid both are adjectives.

Word	Noun	Adjective	Verb	Adverb
cotyloidal	No	Yes	No	No
cotyloid	No	Yes	No	No

As adjectives, cotyloidal and cotyloid are synonyms defined as:

cotyloidal and cotyloid: of the cup-shaped socket that receives the head of the thigh bone

Other synonyms of cotyloidal include acetabular.

cotyloidal (adjective)	cotyloid (adjective)
of the cup-shaped socket that receives the head of the thigh bone	of the cup-shaped socket that receives the head of the thigh bone