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List of 12-letter words containing

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There are 14 twelve-letter words containing I, O, R, 3S and Y

AREOSYSTILESAREOSYSTILE n. a building or colonnade alternately araeostyle and systyle, also ARAEOSYSTYLE.
ASTROPHYSICSastrophysics n. The branch of astronomy or physics that deals with the physical properties of celestial bodies and with…
ASTROPHYSICS n. a branch of astronomy dealing esp. with the behavior, physical properties, and dynamic processes of celestial objects and phenomena.
DISASTROUSLYdisastrously adv. In a disastrous way. (Of the nature of a disaster; calamitously.)
DISASTROUS adv. attended by or causing suffering or disaster.
FAIRYFLOSSESFAIRYFLOSS n. (Australian) candyfloss.
HYPEROSTOSIShyperostosis n. (Medicine) An excessive growth or thickening of bone.
HYPEROSTOSIS n. abnormal growth of bone tissue.
PRESBYCOUSISPRESBYCOUSIS n. progressive loss of hearing with advancing old age, also PRESBYACOUSIS, PRESBYACUSIS, PRESBYCUSIS.
PROSELYTISESproselytises v. Third-person singular simple present indicative form of proselytise.
PROSELYTISE v. to recruit or convert esp. to a new faith, institution, or cause, also PROSELYTIZE.
PROSELYTISMSproselytisms n. Plural of proselytism.
PROSELYTISM n. conversion.
SINISTROUSLYsinistrously adv. In a sinistrous manner; perversely; wrongly; unluckily.
sinistrously adv. With a tendency to use the left hand.
SINISTROUS adv. inauspicious, sinister, also SINISTER.
STRONGYLOSISstrongylosis n. Infection with worms of the genus Strongylus.
STRONGYLOSIS n. infestation with strongyles.
SYMPOSIARCHSsymposiarchs n. Plural of symposiarch.
SYMPOSIARCH n. the master, director, etc. of a feast or conference.
SYNARTHROSISsynarthrosis n. (Anatomy) A type of joint in which two bones are connected rigidly by fibrous tissue.
SYNARTHROSIS n. the fixed articulation of bones.
SYNCHRONISESsynchronises v. Third-person singular simple present indicative form of synchronise.
SYNCHRONISE v. to cause to happen at the same time, also SYNCHRONIZE.
SYNCHRONISMSsynchronisms n. Plural of synchronism.
SYNCHRONISM n. the state of being synchronous.

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 1Word.ws and WikWik.org.

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See this list for:

  • English Wiktionary: 64 words
  • Scrabble in French: 20 words
  • Scrabble in Spanish: 2 words
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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