Upas is a 4 letter English word. It's valid Scrabble word worth 6 points. It's valid Words with friends word worth 8 points.
You can make 32 anagrams from letters in upas (apsu).
1775-85; Javanese: poison, especially dart poison
The darts used are about five inches long, and are dipped in upas juice.
She emanated poison as nightshade emanates it, the upas tree.
The poison for these darts is obtained from the ipoh tree (upas).
One writer has likened the whole modern system to the upas tree.
This was the only specimen of the upas tree that I saw in Borneo.
On another street in this city is another branch from the upas tree.
In Africa you have the upas, the fierce compound of simoom and tornado.
I knew I should die under the upas tree of his hateful presence!
The upas does not grow as a gregarious tree, and is nowhere found in numbers.
But it was now far away, or at least no longer to be dreaded from the poison of the upas.