ISOS is valid in Collins, not in North America — 4 points
It depends on the list you play by. ISOS is in Collins, used in the UK and most of the world, but it is not in the North American lists — so in a US or Canadian game an opponent can challenge it off the board. Worth 4 points. Words with Friends does not accept it either.
Which word lists accept ISOS?
| Official Scrabble Players DictionaryUSA, Canada, Thailand | Not listed |
|---|---|
| Official Tournament and Club Word ListUSA, Canada, Thailand | Not listed |
| Collins Scrabble WordsEnglish in most countries | Valid |
| Words with FriendsZynga word list | Not listed |
Word power: 31 / 100
Our own measure of how useful ISOS is to know. It scores 4 from 4 tiles, takes 2 hooks, and its letters make up 6.3% of the bag. How this number is calculated
Hooks for ISOS
Checked against OSPD, TWL, CSW, WWF.
How ISOS scores
Face value of the 4 tiles in ISOS, before any board multiplier.
Tiles you need
| Letter | Needed | In the bag |
|---|---|---|
| i | 1 | 9 |
| s | 2 | 4 |
| o | 1 | 8 |
Drawing exactly these 4 tiles as an opening rack: 1 in 9,077.
Words starting with ISOS
23 longer words begin with ISOS.
Words ending in ISOS
6 words end in ISOS. Useful as a back hook: play ISOS onto a word already on the board.
Shorter words from the letters in ISOS
Common questions about ISOS
- Is ISOS valid in Words with Friends?
- No. Words with Friends keeps its own list, separate from the Scrabble dictionaries, and ISOS is not in it.
- How many points is ISOS worth?
- ISOS is worth 4 points in Scrabble and 4 points in Words with Friends.
- What letters can be added to ISOS?
- ISOS takes 2 hooks: 2 in front and 0 at the end.
Every word you can build from the 4 letters of ISOS:
Open ISOS in the Word Finder