(a.) Frothy; foamy; spumy, like yeast.

agog airy aquiver aroused atingle atwitter barmy bubbly bursting carried away diastatic dizzy downy ebullient effervescent enzymic ethereal excited exhilarated featherbrained feathery fermenting fired flighty fluffy foam-flecked foamy fribbling frivolous frothy giddy gossamery harebrained heady high hopped up impassioned imponderous inflamed keyed up lathered up lathery leavening leger light light as air light-headed lighter than vanity manic mousse moved raising ready to burst roused scatterbrained soapsuddy soapsudsy soapy souffle spumose spumous spumy steamed up stimulated stirred stirred up suddy sudsy thrilled tingling tingly turned-on unheavy volatile weightless whipped up worked up working wrought up