discoid vs discoidal

discoid and discoidal both are adjectives.

Word	Noun	Adjective	Verb	Adverb
discoid	No	Yes	No	No
discoidal	No	Yes	No	No

As adjectives, discoid and discoidal are synonyms defined as:

Other synonyms of discoid include disc-shaped, disclike, disk-shaped, disklike.

discoid (adjective)	discoidal (adjective)
having a flat circular shape	having a flat circular shape