List of 11-letter words ending with

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There are 11 eleven-letter words ending with ACK

BIOFEEDBACK	• biofeedback n. A technique consisting of measuring a person’s quantifiable bodily functions, such as blood pressure… • BIOFEEDBACK n. a technique for learning control of autonomic body functions in response to monitoring by electronic instruments such as an electrocardiograph.
CRACKERJACK	• crackerjack adj. Exceptionally fine or excellent; top-notch; high quality. • crackerjack adj. Expert, top-rated or high-performing. • crackerjack n. An exceptionally fine or excellent thing or person.
CYBERATTACK	• cyberattack n. An attack or intrusion by means of a computer network such as the Internet, often for the purpose of spying. • cyberattack v. To launch a cyberattack. • cyber-attack n. Alternative form of cyberattack.
DIAMONDBACK	• diamondback n. (Common name) Either of two species of rattlesnake having a diamond pattern on the back: Crotalus adamanteus… • diamondback n. The saltmarsh terrapin of the Atlantic coast (Malaclemys terrapin). • DIAMONDBACK n. a kind of rattlesnake.
GOOGLEWHACK	• googlewhack n. A Google search result consisting of a single hit, in response to a search on two separate words. • GOOGLEWHACK n. an Internet search that produces one hit only.
LEATHERBACK	• leatherback n. A large sea turtle, Dermochelys coriacea, with a leathery back. • LEATHERBACK n. a kind of large sea turtle.
QUARTERBACK	• quarterback n. (American football, Canadian football) An offensive back whose primary job is to pass the ball in a play. • quarterback n. (American football, historical) An offensive back who receives the snap (hike) and then blocks the defense… • quarterback n. (Rugby football, historical) A position just behind the forwards, or one who plays this position.
SCRATCHBACK	• scratchback n. (UK, dated) A toy which imitates the sound of tearing cloth, used by drawing it across the back of unsuspecting… • SCRATCHBACK n. a backscratcher.
SINGLETRACK	• singletrack n. A narrow mountain biking trail that is approximately the width of the bicycle. • single-track adj. (Rail transport) Having only a single track so that trains may only run in one direction at a time. • single␣track n. Alternative spelling of singletrack.
STEEPLEJACK	• steeplejack n. A person whose job involves climbing tall structures like steeples in order to make repairs. • STEEPLEJACK n. a person who repairs steeples and high chimneys.
STICKLEBACK	• stickleback n. Any one of numerous species of small fish of the family Gasterosteidae. The back is armed with two or… • STICKLEBACK n. a freshwater fish with a spiny back.

Scrabble words — in black are valid world wide — in RED are not valid in North America — in GREEN are valid only in North America.
Definitions are short excerpt from the WikWik.org and 1Word.ws.

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English Wiktionary: 157 words
Scrabble in French: 2 words
Scrabble in Spanish: no word
Scrabble in Italian: 2 words
Scrabble in German: no word
Scrabble in Romanian: 1 word

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