1) Become inflated 2) Move with great difficulty 3) Moving ridge 4) Puff out 5) Puff up in the breeze 6) Rise up as if in waves 7) Sea swell 8) Surge 9) Surge or swell 10) Swell out 11) To surge or roll in billows 12) To swell out or bulge 13) Wave 1) Sea 2) Wave 
• (v. i.) To surge; to rise and roll in waves or surges; to undulate. • (n.) A great wave or surge of the sea or other water, caused usually by violent wind. • (n.) A great wave or flood of anything.
Bil'low intransitive verb [ imperfect & past participle Billowed ; present participle & verbal noun Billowing .] To surge; to rise and roll in waves or surges; to undulate. 'The billowing snow.' Prior. Bil'low noun [ Confer Icelandic bylgja billow, Danish bölge , Swedish bölja ; akin to Middle High German bulge billow, bag, and to English bulge . See Bulge .] 1. A great wave or surge of the sea or other water, caused usually by violent wind. �...
[n] - a large sea wave 2. [v] - move with great difficulty 3. [v] - billow forth 4. [v] - rise and move, as in waves or billows
noun a large sea wave
a great wave or surge of the sea. · any surging mass: billows of smoke.