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

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n. The amount that a room can hold: a roomful of furniture.

n. The number of people that a room can hold: a roomful of guests.

n. The number of people in a room, considered as a group: The whole roomful gasped when he entered wearing a bizarre costume.

n. The amount that a room can hold, especially the number of people that can fit into a room

n. The people in a room, considered as a group

adj. Abounding with room or rooms; roomy.

n. As much or many as a room will hold.

Abounding with rooms; roomy; spacious.

n. As much or as many as a room will hold: as, a roomful of people.

n. the quantity a room will hold

"He was vexed with the levity that had made him call his roomful together on so poor a pretext, and yet was vexed with the stupidity that made the witnesses so evidently find the pretext sufficient."

containerful   

roomy   

boatload    houseful    mewing    chasuble    evangelizing    shipload