Sill is a 4 letter English word. It's valid Scrabble word worth 4 points. It's valid Words with friends word worth 6 points.
You can make 19 anagrams from letters in Sill (ills).
before 900; Middle English sille, Old English syl, sylle; cognate with Low German süll, Old Norse syll; akin to German Schwelle sill
He landed on his back upon the nets, sill and a foot of boarding in his hands.
Another journalist begged him to do a sill walk live on stage then and there, but he demurred.
She put her elbows on the sill of the window and rested her face in her hands.
"You let me step in," answered Mattie, a determined foot on the sill.
In a moment he had slipped over the sill and stood upon the porch.
He mechanically stretched out a hand and felt along the sill.
We stood in the open doors with one foot resting on the sill and an elbow cocked on the roof, looking cool.
The sill is freezing in the winter and stultifyingly hot in the summer.
I'll get on the sill and see what I can do through the top o' the window.
Presently the rod must have tapped the sill, with such a start did she face about.