shrink-wrap vs plastic film

shrink-wrap and plastic film both are nouns.

Word	Noun	Adjective	Verb	Adverb
shrink-wrap	Yes	No	No	No
plastic film	Yes	No	No	No

As nouns, plastic film is a hypernym of shrink-wrap; that is, plastic film is a word with a broader meaning than shrink-wrap:

shrink-wrap: the clinging transparent plastic film that is used to shrinkwrap something
plastic film: a thin sheet of (usually plastic and usually transparent) material used to wrap or cover things

Other hypernyms of shrink-wrap include film.

shrink-wrap (noun)	plastic film (noun)
the clinging transparent plastic film that is used to shrinkwrap something	a thin sheet of (usually plastic and usually transparent) material used to wrap or cover things