Billow \Bil"low\, n. [Cf. Icel. bylgja billow, Dan. b["o]lge, Sw. b["o]lja; akin to MHG. bulge billow, bag, and to E. bulge. See Bulge.]

1. A great wave or surge of the sea or other water, caused usually by violent wind. [1913 Webster]

Whom the winds waft where'er the billows roll. --Cowper. [1913 Webster]

2. A great wave or flood of anything. --Milton. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

Billow \Bil"low\, v. i. [imp. & p. p. Billowed; p. pr. & vb. n. Billowing.]

To surge; to rise and roll in waves or surges; to undulate. "The billowing snow." --Prior. [1913 Webster]

Source: The Collaborative International Dictionary of English v.0.48
 

67 Moby Thesaurus words for "billow": bag, balloon, be poised, belly, belly out, bilge, bore, bouge, break, breakers, bug, bulge, chop, choppiness, chopping sea, comb, comber, crash, dash, dilate, dirty water, distend, eagre, ebb and flow, goggle, gravity wave, ground swell, heave, heavy sea, heavy swell, lift, lop, peak, pooch, pop, popple, pouch, pout, riffle, ripple, rise, rise and fall, roll, roller, rough water, round out, scend, sea, send, smash, surf, surge, swell, swell out, tidal bore, tidal wave, tide wave, toss, trough, tsunami, undulate, undulation, water wave, wave, wavelet, white horses, whitecaps

Source: Moby Thesaurus II by Grady Ward, 1.0
 

billow

Source: WordNet (r) 2.0
 

Billow \Bil"low\, n. [Cf. Icel. bylgja billow, Dan. b["o]lge, Sw. b["o]lja; akin to MHG. bulge billow, bag, and to E. bulge. See Bulge.]

1. A great wave or surge of the sea or other water, caused usually by violent wind.

Whom the winds waft where'er the billows roll. --Cowper.

2. A great wave or flood of anything. --Milton.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Billow \Bil"low\, v. i. [imp. & p. p. Billowed; p. pr. & vb. n. Billowing.]

To surge; to rise and roll in waves or surges; to undulate. ``The billowing snow.'' --Prior.

Source: Webster's Revised Unabridged Dictionary (1913)