amyloidal vs amyloid

amyloidal is not a noun while amyloid is a noun.

Word	Noun	Adjective	Verb	Adverb
amyloidal	No	Yes	No	No
amyloid	Yes	Yes	No	No

As adjectives, amyloidal and amyloid are synonyms defined as:

Other synonyms of amyloidal include amylaceous, farinaceous, starchlike.

amyloidal (noun)	amyloid (noun)
	(pathology) a waxy translucent complex protein resembling starch that results from degeneration of tissue
	a non-nitrogenous food substance consisting chiefly of starch; any substance resembling starch

amyloidal (adjective)	amyloid (adjective)
resembling starch	resembling starch