泡 - bubbles, foam, suds

bubble; foam; froth; suds; lather; head (on beer)

foaming

styrofoam; styrene foam; expanded polystyrene

foam; bubble

(air) bubble (esp. in a liquid)

bubble chamber

whipped cream

foaming agent

Bostrycapulus gravispinosus (species of spiny slipper snail)

bubble bath

eggbeater; whisk

Canada goldenrod (Solidago canadensis var. scabra)