cumulus

1. A dense, white, fluffy, flat-based cloud with a multiple rounded top and a well-defined outline, usually formed by the ascent of thermally unstable air masses.

2. A pile, mound, or heap.

3. A dense puffy cloud form having a flat base and rounded outlines often piled up like a mountain .

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Top Words by points	Points	Word Game
cumulus	11	Scrabble

2 Letters	Scrabble® Points
us	2
mu	4
um	4

3 Letters	Scrabble® Points
cum	7
ums	5
ulu	3
lum	5
mus	5
sum	5

4 Letters	Scrabble® Points
ulus	4
sulu	4
slum	6
scum	8
lums	6
culm	8

5 Letters	Scrabble® Points
mucus	9
culms	9

7 Letters	Scrabble® Points
cumulus	11