Wave , swell , surge ,
crest, tide, swell, wave
The word 'billow' functions as both a verb and a noun.Examples:We watched the clouds billow in the breeze. (verb)A billow of smoke from the campfire enveloped the campers. (noun)
Bladerdach, bull, malarky, rot, trash, billow, distend, enlarge, expand, inflate
The word 'billow' is both a noun (billow, billows) and a verb (billow, billows, billowing, billowed).The noun billow is a singular, common, concrete noun; a word for a large undulating mass, such as a cloud, smoke, or steam; a rolling mass like a high wave; a word for a thing.The verb to billow is to to fill with air and swell outward; to rise or roll in waves.
He watched the cumulus clouds billow as the winds blew them over the mountaintop. (verb) A huge billow of smog engulfed the valley below the factory. (noun)
cave in, depress, decline, recede
It depends which form of cloud you're using.'a cloud of smoke' (noun): billow, blanket'the sky is cloudy' (verb): overcast, darken'cloud your judgement' (verb): obscure, muddy
Her cape billowed around her ankles as she strode into the sunset.
synonymize
word for word
I saw a huge billow down by the beach yesterday!
The antonym of the word 'synonym' is 'antonym'.