serpent vs constrictor

serpent and constrictor both are nouns.

Word	Noun	Adjective	Verb	Adverb
serpent	Yes	No	No	No
constrictor	Yes	No	No	No

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

serpent: limbless scaly elongate reptile; some are venomous
constrictor: any of various large nonvenomous snakes that kill their prey by crushing it in its coils

Other hyponyms of serpent include colubrid, colubrid snake, blind snake, worm snake, elapid, elapid snake, sea snake, viper.

serpent (noun)	constrictor (noun)
limbless scaly elongate reptile; some are venomous	any of various large nonvenomous snakes that kill their prey by crushing it in its coils
an obsolete bass cornet; resembles a snake
a firework that moves in serpentine manner when ignited