peptide vs polypeptide

peptide and polypeptide both are nouns.

Word	Noun	Adjective	Verb	Adverb
peptide	Yes	No	No	No
polypeptide	Yes	No	No	No

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

peptide: amide combining the amino group of one amino acid with the carboxyl group of another; usually obtained by partial hydrolysis of protein
polypeptide: a peptide containing 10 to more than 100 amino acids

Other hyponyms of peptide include fibrinopeptide, endorphin.

peptide (noun)	polypeptide (noun)
amide combining the amino group of one amino acid with the carboxyl group of another; usually obtained by partial hydrolysis of protein	a peptide containing 10 to more than 100 amino acids