quack is a valid English word

Scrabble validity: valid ( international - Sowpods, US - Twl06 )
iScramble validity: valid
QuickWords validity: valid

Meanings

Noun (COUNTABLE)

The sound made by a duck.
• Did you hear that duck make a quack?
(pejorative) A fraudulent healer, especially a bombastic peddler in worthless treatments, a doctor who makes false diagnoses for monetary benefit, or an untrained or poorly trained doctor who uses fraudulent credentials to attract patients (from c. 1630)
• That doctor is nothing but a lousy quack!
(figuratively pejorative) Any similar charlatan or incompetent professional.

Verb

To make a noise like a duck.
• The more breadcrumbs I threw on the ground, the more they quacked.
(intransitive) Of a queen bee: to make a high-pitched sound during certain stages of development.
• Coordinate terms: toot, pipe
To practice or commit quackery (fraudulent medicine).

Adjective (COMPARABLE)

Falsely presented as having medicinal powers.
• Don't get your hopes up; that's quack medicine!

quack is a Scrabble valid word

quack

• International English (Sowpods) - The word is valid in Scrabble ✔
• US English (TWL06) - The word is valid in Scrabble ✔
• 00 points

quack is an iScramble, QuickWords valid word

quack

• The word is valid in iScramble ✔
• The word is valid in QuickWords ✔
• 00 points

Same letters words (Anagrams)

• none

Same letters plus one

• QUACKS
• QUACKY

Same letters minus one

• CAUK
• KUQA