Polyfoam and Styrofoam

Polyfoam noun - A foam made by adding water to polyurethane plastics.

Styrofoam and polyfoam are semantically related in foam plastic topic. In some cases you can use "Styrofoam" instead a noun "Polyfoam", when it comes to topics like plastic foam.

Styrofoam noun - A light resilient foam of polystyrene.

Polyfoam and styrofoam are semantically related in foam plastic topic. You can use "Polyfoam" instead a noun "Styrofoam", if it concerns topics such as plastic foam.