The word ack is not a valid scrabble word

3 short excerpts of WikWik.org (WikWik is an online database of words defined in the English, French, Spanish, Italian, and other Wiktionnaries.)

  • ack n. (Military, now historical) The letter A as used in signalling and other types of communications.
  • ack n. (Data communications) acknowledgment signal.
  • ack v. Alternative form of ACK.

19 valid words from 3 definitions

ACKNOWLEDGMENT ALTERNATIVE AND AS COMMUNICATIONS DATA FORM HISTORICAL IN LETTER MILITARY NOW OF OTHER SIGNAL SIGNALLING THE TYPES USED

1 invalid word from 3 definitions

ACK

8 cousins (New words found by changing only one letter.)

ACE ACH ACT ARK ASK AUK AWK ICK

22 suffixes (New words found by adding one or more letters at the end of the word.)

ACKEE ACKER ACKEES ACKERS ACKNEW ACKNOW ACKNOWN ACKNOWS ACKNOWNE ACKNOWING ACKNOWLEDGE ACKNOWLEDGED ACKNOWLEDGER ACKNOWLEDGES ACKNOWLEDGERS ACKNOWLEDGING ACKNOWLEDGEDLY ACKNOWLEDGMENT ACKNOWLEDGEABLE ACKNOWLEDGEABLY ACKNOWLEDGEMENT ACKNOWLEDGMENTS

1835 times in the middle (New words found by adding letters in front and at the end of the word.)

BACKS CACKS CACKY DACKS HACKS JACKS JACKY KACKS LACKS MACKS PACKS RACKS SACKS TACKS TACKY WACKE WACKO WACKS WACKY YACKA YACKS ZACKS BACKED BACKER BACKET BACKIE BACKUP BLACKS BRACKS CACKED CACKLE CHACKS CLACKS CRACKS CRACKY DACKED DACKER FLACKS FRACKS HACKED HACKEE HACKER HACKIE HACKLE HACKLY JACKAL JACKED JACKER JACKET JACKSY + 1785 words

340 prefixes (New words found by adding one or more letters in front of the word.)

BACK CACK DACK HACK JACK KACK LACK MACK PACK RACK SACK TACK WACK YACK ZACK ABACK ALACK BLACK BRACK CHACK CLACK CRACK DRACK FLACK FRACK KIACK KNACK KYACK PLACK QUACK SHACK SLACK SMACK SNACK STACK SWACK THACK TRACK WHACK WRACK ARRACK ATTACK AWRACK BIPACK CARACK CHIACK CHYACK EIRACK HIJACK REBACK + 290 words

22 anagrams plus one (New words formed with all the letters from the word plus a letter.)

+B BACK
+C CACK
+D DACK
+E CAKE
+H HACK
+J JACK
+K KACK
+L CALK LACK
+M MACK
+P PACK
+R CARK RACK
+S CASK SACK
+T TACK
+U CAUK
+W CAWK WACK
+Y CAKY YACK
+Z ZACK

One anagram minus one (New word formed with all the letters from the word minus a letter.)

-C KA

Scrabble scoring

  • Zero, invalid.
  • 9 points, without game rules.

Other languages

Categories without words

  • No words-in-word (Word found as is inside the word.)
  • No words-in-word RTL (Word found written from right to left, inside the word.)
  • No anagrams (Word found by changing the order of the letters.)
  • No lipograms (Word found when removing only one letter.)
  • No epentheses (Word found when adding only one letter.)

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.

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