albuminoid vs gelatin

albuminoid and gelatin both are nouns.

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

As nouns, gelatin is a hyponym of albuminoid; that is, gelatin 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
gelatin: a colorless water-soluble glutinous protein obtained from animal tissues such as bone and skin

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

albuminoid (noun)	gelatin (noun)
a simple protein found in horny and cartilaginous tissues and in the lens of the eye	a thin translucent membrane used over stage lights for color effects
	an edible jelly (sweet or pungent) made with gelatin and used as a dessert or salad base or a coating for foods
	a colorless water-soluble glutinous protein obtained from animal tissues such as bone and skin