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 There are 7 ten-letter words beginning with ULTRAS| ULTRASHARP | • ultrasharp adj. Extremely or excessively sharp; rapier. • ULTRASHARP adj. very very sharp.
 |  | ULTRASHORT | • ultrashort adj. Very short. • ultrashort adj. (Sciences) Extremely short in duration, typically on the femtosecond scale.
 • ultrashort adj. (Physics, of a wave) Having a wavelength of between 1 and 10 metres.
 |  | ULTRASLICK | • ultraslick adj. Extremely slick. • ULTRASLICK adj. very very slick.
 |  | ULTRASMALL | • ultrasmall adj. Extremely or exceedingly small. • ULTRASMALL adj. very very small.
 |  | ULTRASMART | • ultrasmart adj. Extremely smart. • ULTRASMART adj. very very smart.
 |  | ULTRASONIC | • ultrasonic adj. (Acoustics) Beyond (higher in frequency than) the range of sound perceptible to the human ear; with… • ULTRASONIC adj. denoting airwaves or vibrations with frequencies higher than those audible to the human ear.
 |  | ULTRASOUND | • ultrasound n. (Physics) Sound with a frequency greater than the upper limit of human hearing, which is approximately 20 kilohertz. • ultrasound n. (Medicine) The use of ultrasonic waves for diagnostic or therapeutic purposes.
 • ultrasound v. (Transitive, intransitive) To treat with ultrasound.
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 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.
 
 See this list for:English Wiktionary: 12 wordsScrabble in French: no wordScrabble in Spanish: no wordScrabble in Italian: 2 wordsScrabble in German: no wordScrabble in Romanian: 4 words
 
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