The Collaborative International Dictionary of English v.0.48:

Spume \Spume\ (sp[=u]m), n. [L. spuma. Cf. Pumice, Spoom.]
   Frothy matter raised on liquids by boiling, effervescence, or
   agitation; froth; foam; scum.
   [1913 Webster]

         Materials dark and crude,
         Of spiritous and fiery spume.            --Milton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Spume \Spume\, v. i. [imp. & p. p. Spumed (sp[=u]md); p. pr. &
   vb. n. Spuming.] [L. spumare.]
   To froth; to foam.
   [1913 Webster]

WordNet (r) 3.0 (2006):

spume
    n 1: foam or froth on the sea
    v 1: make froth or foam and become bubbly; "The river foamed"
         [syn: froth, spume, suds]

Moby Thesaurus II by Grady Ward, 1.0:

58 Moby Thesaurus words for "spume":
   aerate, air, beat, breakers, bubble, chaff, chip, cobweb, collar,
   cork, cream, down, dust, ether, fairy, feather, flue, fluff, foam,
   froth, fuzz, gossamer, head, lather, mantle, meringue, mote,
   mousse, offscum, plash, puff, scud, scum, sea foam, shower, slosh,
   soapsuds, souffle, sparge, spatter, spindrift, splash, splatter,
   sponge, spoondrift, spray, sprinkle, stinging, straw, sud, suds,
   surf, swash, thistledown, whip, whisk, white water, yeast