They are in circumstances in which the ripple passes into the wavelet, and the wavelet into the billow.
It flared briefly and let out with a billow of thick red smoke.
Oh, the wreck is on the billow; hasten with the means of safety.
The billow and the wind And the still waters will sweep us away Mercilessly!
The interior of the house was a billow of red, white, and blue.