cysteine vs aminoalkanoic acid

cysteine and aminoalkanoic acid both are nouns.

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

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

cysteine: an amino acid containing sulfur that is found in most proteins; oxidizes on exposure to air to form cystine
aminoalkanoic acid: organic compounds containing an amino group and a carboxylic acid group

Other hypernyms of cysteine include amino acid.

cysteine (noun)	aminoalkanoic acid (noun)
an amino acid containing sulfur that is found in most proteins; oxidizes on exposure to air to form cystine	organic compounds containing an amino group and a carboxylic acid group