- foam, froth - a mass of small bubbles formed in or on a liquid
--1 is a kind of bubble
--1 has particulars:shaving foam; head; lather; soapsuds, suds, lather; spume; white water Derived form: verb foam1 - foam - a lightweight material in cellular form; made by introducing gas bubbles during manufacture
--2 is a kind of material, stuff
--2 has particulars: Styrofoam; foam rubber