This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. A large wave or swell of water.

n. A great swell, surge, or undulating mass, as of smoke or sound.

verb-intransitive. To surge or roll in billows.

verb-intransitive. To swell out or bulge: sheets billowing in the breeze.

v. To cause to billow: wind that billowed the sails.

n. A large wave, swell, surge, or undulating mass of something, such as water, smoke, fabric or sound

v. To surge or roll in billows

v. To swell out or bulge

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.

verb-intransitive. To surge; to rise and roll in waves or surges; to undulate.

n. A great wave or surge of the sea, occasioned usually by a violent wind: much used in figurative applications, and often, especially in the plural, as merely equivalent to wave: as, the billows of sorrow rolled over him.

n. Synonyms See wave.

To swell; rise and roll in large waves or surges.

To raise in waves or billows.

n. a large sea wave

v. become inflated

v. move with great difficulty

v. rise and move, as in waves or billows

v. rise up as if in waves

"If ever it comes into my life again (a friend or family with breast cancer) a billow is the ideal gift."

billowed    billowes    billowing    billows   

moving ridge    wave    locomote    travel    move    go    inflate    blow up   

atmospheric billow   

billowed    billowing   

surge    undulate    wave    undulation    swell   

Amarillo    Camarillo    Hermosillo    Murillo    armadillo    caudillo    cillo    granillo    pillow    trillo   

swirl    surf    expanse    tide    torrent    breaker    ripple    waterfall    surge    haze