sorption

sorption is a valid word in Scrabble and Words With Friends. It has 8 letters and scores 10 points before any board bonuses (s 1 + o 1 + r 1 + p 3 + t 1 + i 1 + o 1 + n 1).

It is an anagram of 2 other words: portions, positron.

“SORPTION” on Wiktionary