J, X, Z, Q and K are the tiles that make your heart jump when you draw them and sink when you cannot play them. In Scrabble they are worth 8 (J and X), 10 (Q and Z) and 5 (K) points, and a standard set has only one of each. Play them well and they carry your score. Hold them too long and they quietly ruin your rack.
We counted how each of these letters behaves in the JumbleFix word list: how common it is, where in a word it likes to sit, which short words use it, and which letters it needs as company.
Why holding them hurts
In our analysis of seven-letter racks, the typical rack hides 65 playable words. Racks with a Q hide a median of just 37. Z racks hide 42, J racks 44.5 and X racks 49. A rare letter is worth points, but until you play it, it cuts your options by a quarter or more, and a Q cuts them nearly in half.
So the general rule is simple: play a rare letter for good value soon, rather than waiting for a perfect spot.
J: a starter, almost never a finisher
- 2,302 words contain a J, 1.5% of the list.
- 57% of them start with J. Almost none end with it: just seven do, including HAJ, RAJ and TAJ.
- Two-letter word: JO, a sweetheart in Scots.
- Three-letter words: 26, including JAB, JAM, JAR, JAW, JAY, JET, JIG, JOB, JOG, JOT, JOY, JUG and JUT.
- Best company: E appears in 62% of J words, S in 50%, I in 49% and A in 48%.
How to play it: look for an open space where the J can start a word. JO is your best friend for tight spots, and a J on a double or triple letter square next to a vowel is worth chasing.
X: the most flexible high scorer
- 4,093 words contain an X, 2.6% of the list.
- X rarely starts a word (3%) but often ends one (9%).
- Two-letter words: five of them, AX, EX, OX, XI and XU, which is more than any other rare letter.
- Three-letter words: 36, including BOX, FAX, FIX, FOX, HEX, MIX, SIX, TAX, VEX, WAX and ZAX.
- Best company: E. An E appears in 80% of all X words, the strongest pairing here apart from Q and U.
How to play it: X is the easiest rare letter to cash in because of those five two-letter words. X marks the spot, and the spot you want is a triple letter square. Place the X there so it forms a two-letter word in both directions, and the X alone counts 24 points in each word. If you hold an X, try to keep an E alongside it.
Z: worth the most, and needs a vowel
- 5,821 words contain a Z, 3.7% of the list.
- Z starts 9% of its words and ends just 1%.
- Two-letter words: none. ZA, which many players know, is not in the ENABLE list we use.
- Three-letter words: 19: ADZ, AZO, BIZ, COZ, FEZ, FIZ, WIZ, ZAG, ZAP, ZAX, ZED, ZEE, ZEK, ZIG, ZIN, ZIP, ZIT, ZOA and ZOO.
- Best company: I and E. An I appears in 78% of Z words and an E in 75%.
How to play it: with no two-letter word, Z needs a bit more room. Learn the three-letter list above, keep an I or an E if you can, and look for spots where FEZ, ZAP or ZIP can land on a premium square.
Q: the letter that needs a partner
- 2,308 words contain a Q, 1.5% of the list.
- All but 29 follow the Q with a U. Those 29 are in our list of every Q without a U.
- 33% of Q words start with Q.
- Two-letter words: none in ENABLE. QI, which newer official dictionaries accept, is not on this list.
- Three-letter words: only three, QAT, QUA and SUQ.
How to play it: if you have a Q, hold a U if one comes along, or plan for QAT, QAID or SUQ. If neither is coming, the Q-without-U words are your escape hatch. Because Q racks are the poorest racks of all, it is often worth playing a Q for modest points just to free up your rack.
K: the friendly one
- 11,761 words contain a K, 7.5% of the list, far more than the other four.
- K is comfortable at both ends: it starts 14% of its words and ends 12%.
- 29.6% of K words contain CK, and 209 words start with KN.
- Two-letter word: KA, the spiritual self in ancient Egyptian belief.
- Three-letter words: 51, including ASK, ELK, INK, OAK, SKI, SKY, YAK, KEY, KID, KIT, KEG and ZEK.
How to play it: K is the least troublesome of the five. It goes almost anywhere, and words like SKI, INK and OAK fit into small gaps easily.
Two at once
280 words in the list contain two of J, Q, X and Z together, including BEZIQUE, EQUALIZE, JUKEBOX and BIJOUX. You will rarely hold two of these tiles at once, but when you do, JUKEBOX alone is worth 27 face-value points.
A short checklist
- Do not hoard rare letters: racks with them hide far fewer words.
- J starts words; look for openings at the front.
- X loves E and has five two-letter words; aim for two-way plays.
- Z needs an I or an E; learn its 19 three-letter words.
- Q needs a U, or one of the 29 words that skip it.
- K is flexible; use it to fill tight spots.
To check what any rack can make and what it scores, try the Scrabble word finder and the word score calculator.
How we counted
We started from the ENABLE word list, a public-domain list used by many word games (172,823 words), and kept the 155,976 words that are also active on JumbleFix. For each letter we counted the words that contain it at least once, where it appears, and the other letters those words contain. The rack figures come from our analysis of all 19,388 seven-letter racks in an earlier article, How Many Words Hide in a Seven-Letter Rack?.
Written by Morty Leonid with AI assistance. Every count in this article comes from queries against the JumbleFix word list.