Polaroid and Plastic film

Polaroid noun - (trade mark) a plastic film that can polarize a beam of light; often used in sunglasses to eliminate glare.

Plastic film and Polaroid are semantically related. In some cases you can use "Plastic film" instead a noun "Polaroid".

Plastic film noun - A thin sheet of (usually plastic and usually transparent) material used to wrap or cover things.

Polaroid and plastic film are semantically related. Sometimes you can replace term "Polaroid" with "Plastic film", this terms are similar.