spumy
Like churned waves
Spumy means foamy or frothy, covered with or resembling foam: spumy waves crashed against the rocks.
The word is literary and uncommon, appearing mostly in poetry or elevated prose to describe churning water, beer head, or anything producing light, airy bubbles.
Mass of small bubbles
seafoam · spindrift · surf · whitecaps · cappuccino · latte · beer · mousse
froth
Mass of small bubbles
head · seafoam · spindrift · surf · whitecaps · cappuccino · latte · beer · mousse · whipped
waves
Traveling energy disturbances
spindrift · breakers · spray · tide · crest · churn · splash · wake · billow · swell
airy
Light and well-ventilated
delicate · gossamer · featherlight · ethereal · billowy · floaty · insubstantial · vaporous · cloudlike · soft