Polaroid vs plastic film

Polaroid and plastic film both are nouns.

Word	Noun	Adjective	Verb	Adverb
Polaroid	Yes	No	No	No
plastic film	Yes	No	No	No

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

Polaroid: (trade mark) a plastic film that can polarize a beam of light; often used in sunglasses to eliminate glare
plastic film: a thin sheet of (usually plastic and usually transparent) material used to wrap or cover things

Other hypernyms of Polaroid include film.

Polaroid (noun)	plastic film (noun)
(trade mark) a plastic film that can polarize a beam of light; often used in sunglasses to eliminate glare	a thin sheet of (usually plastic and usually transparent) material used to wrap or cover things