bucketful

noun2

1. •
   The quantity contained in a bucket.

   • "I had a fire lit there, and there is a bucketful of coals. You will be pretty comfortable, I hope." — 1925
2. •
   A large quantity.

   • But out of the water he dared not put his head; for the rain came down by bucketsful, and the hail hammered like shot on the stream, and churned it into foam; […] — 1863