foam

ot noun

1. A substance composed of a large collection of bubbles or their solidified remains. He doesn't like so much foam in his beer.
2. A substance formed by trapping pockets of gas in a liquid or solid. A foam mat can soften a hard seat.
3. (by extension) Sea foam; the sea. He is in Europe, across the foam.
4. Fury.

fe’l verb

1. To form or emit foam.
2. To spew saliva as foam, to foam at the mouth.