serine vs amino acid

serine and amino acid both are nouns.

Word	Noun	Adjective	Verb	Adverb
serine	Yes	No	No	No
amino acid	Yes	No	No	No

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

serine: a sweetish crystalline amino acid involved in the synthesis by the body of cysteine
amino acid: organic compounds containing an amino group and a carboxylic acid group

Other hypernyms of serine include aminoalkanoic acid.

serine (noun)	amino acid (noun)
a sweetish crystalline amino acid involved in the synthesis by the body of cysteine	organic compounds containing an amino group and a carboxylic acid group