cystine vs aminoalkanoic acid

cystine and aminoalkanoic acid both are nouns.

Word	Noun	Adjective	Verb	Adverb
cystine	Yes	No	No	No
aminoalkanoic acid	Yes	No	No	No

As nouns, aminoalkanoic acid is a hypernym of cystine; that is, aminoalkanoic acid is a word with a broader meaning than cystine:

cystine: a crystalline amino acid found in proteins (especially keratin); discovered in bladder stones
aminoalkanoic acid: organic compounds containing an amino group and a carboxylic acid group

Other hypernyms of cystine include amino acid.

cystine (noun)	aminoalkanoic acid (noun)
a crystalline amino acid found in proteins (especially keratin); discovered in bladder stones	organic compounds containing an amino group and a carboxylic acid group