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There are 20 thirteen-letter words containing I, M, N, O, R, 2S and Y

ASTRODYNAMICSastrodynamics n. The study of the motion of rockets and other spacecraft usually from Newton’s laws of motion and Newton’s…
ASTRODYNAMICS n. the science of the motion of bodies in outer space and the forces that act on them.
ASYNCHRONISMSasynchronisms n. Plural of asynchronism.
ASYNCHRONISM n. the state of being asynchronous.
CHYMOTRYPSINSchymotrypsins n. Plural of chymotrypsin.
CHYMOTRYPSIN n. rennin.
COMMISSIONARYcommissionary adj. Of, relating to, or conferring a commission.
commissionary adj. Conferred by a commission or warrant.
commissionary n. A commission, an administrative board.
CRYPTOMNESIASCRYPTOMNESIA n. latent or subconscious memory.
EMBRYOGENESISembryogenesis n. The process by which an embryo is formed and develops.
EMBRYOGENESIS n. the production of an embryo.
GYMNOSPERMIESGYMNOSPERMY n. the state of being gymnospermous, having a naked seed.
HYSTEROMANIASHYSTEROMANIA n. hysterical mania, often marked by erotic delusions and an excessive desire to attract attention.
MICROANALYSESmicroanalyses n. Plural of microanalysis.
MICROANALYSIS n. chemical analysis on a small or minute scale.
MICROANALYSISmicroanalysis n. Small-scale analysis.
microanalysis n. (Chemistry) The analysis (and subsequent identification) of very small quantities of material.
microanalysis n. (Social sciences) the analysis of individual or community social activity e.g. family relationships.
MICROANALYSTSmicroanalysts n. Plural of microanalyst.
MICROANALYST n. one who undertakes microanalysis.
MYRINGOSCOPESmyringoscopes n. Plural of myringoscope.
MYRINGOSCOPE n. an instrument for viewing the eardrum.
NYCTITROPISMSNYCTITROPISM n. the assumption by plants of certain positions at night, esp. ones different from daytime positions.
PARASYMBIONTSparasymbionts n. Plural of parasymbiont.
PARASYMBIONT n. a partner in parasymbiosis.
POLYCENTRISMSpolycentrisms n. Plural of polycentrism.
POLYCENTRISM n. the existence of many centers of Communist ideological thought.
PROGYMNASIUMSPROGYMNASIUM n. in Germany, a gymnasium for pupils up to age 16 only, at which university entrance qualifications are not obtainable.
SOMNIFEROUSLYsomniferously adv. In a somniferous way.
SOMNIFEROUS adv. causing sleep.
STREPTOMYCINSstreptomycins n. Plural of streptomycin.
STREPTOMYCIN n. an antibiotic produced by the soil bacterium Streptomyces griseus, the first drug to be successful against tuberculosis.
SYRINGOTOMIESsyringotomies n. Plural of syringotomy.
SYRINGOTOMY n. cutting of a fistula.
VOLUNTARYISMSvoluntaryisms n. Plural of voluntaryism.
VOLUNTARYISM n. the principle or practice of reliance on voluntary action, not coercion.

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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See this list for:

  • English Wiktionary: 86 words
  • Scrabble in French: 22 words
  • Scrabble in Spanish: 3 words
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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