xi needs no unscrambling at all — the two-letter word is already the strongest play its own letters allow, banking 9 points in Scrabble as it stands. In all, 1 valid word comes out of this rack, grouped by length below and checked for Words With Friends as well as Scrabble.
xi is the highest-scoring word from xi, worth 9 points in Scrabble. The top 1 of 1 word is shown here, with the full list organized by length below.
Only one two-letter word uses the letters in xi — and it is xi itself. No unscrambling is needed: the word is already playable as written, worth 9 points in Scrabble.
xi is in the NWL, the official Scrabble word list for North America, and in the Words With Friends dictionary, so it's playable exactly as it stands and needs no unscrambling.
Both totals match, because every tile in xi carries the same value on a Scrabble board and on a Words With Friends board.
Dictionaries record three senses for xi. Scrabble and Words With Friends score tiles and not meanings, so every sense below is worth the same 9 points on a Scrabble board:
xi is the only two-letter word the same letters produce. No arrangement of the same tiles scores higher in Scrabble, so playing xi unchanged also takes the maximum points these letters offer.
The highest-scoring play from these letters is xi, worth 9 points in Scrabble, and no other word from xi earns more points in Scrabble. Words With Friends prices the same letters differently, so the top of the list changes on a Words With Friends board. Both scores count tile values only and exclude premium squares.
The letters in xi produce 1 valid words in the Scrabble and Words With Friends dictionaries. The word count by length is: 1 two-letter word.