albuminoid vs elastin

albuminoid and elastin both are nouns.

Word	Noun	Adjective	Verb	Adverb
albuminoid	Yes	No	No	No
elastin	Yes	No	No	No

As nouns, elastin is a hyponym of albuminoid; that is, elastin is a word with a more specific, narrower meaning than albuminoid:

albuminoid: a simple protein found in horny and cartilaginous tissues and in the lens of the eye
elastin: a fibrous scleroprotein found in elastic tissues such as the walls of arteries

Other hyponyms of albuminoid include collagen, gelatin, gelatine, chondrin, ceratin, keratin.

albuminoid (noun)	elastin (noun)
a simple protein found in horny and cartilaginous tissues and in the lens of the eye	a fibrous scleroprotein found in elastic tissues such as the walls of arteries