Synonyms for Spume:

n.

billow, flood tide, high water, crest, low tide, breaker, high tide, cap, backwash, high-water mark. head, lather, yeast, solid. bubbles (noun)
lather.
froth (noun)
foam, scum, suds.
spray (noun)
scum.
spume (noun)
foam, froth, suds.

v.

change (verb)
suds, froth.

Other synonyms:

yeast, lather. head. Other relevant words:
lather, head, solid, foam, breaker, crest, backwash, billow, yeast, scum, cap.