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List of 15-letter words containing

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There are 19 fifteen-letter words containing I, N, S, T and 2Y

HYDRODYNAMICISThydrodynamicist n. One who studies hydrodynamics.
HYDRODYNAMICIST n. a student of hydrodynamics.
HYPNOTISABILITYhypnotisability n. Alternative spelling of hypnotizability.
HYPNOTISABILITY n. the quality of being hypnotisable, also HYPNOTIZABILITY.
HYPOCRYSTALLINEhypocrystalline adj. (Geology, of igneous rocks) having both glass and crystalline components.
HYPOCRYSTALLINE adj. of igneous rocks, having both glass and crystalline components.
MONOSYLLABICITYmonosyllabicity n. The state or characteristic of being monosyllabic.
MONOSYLLABICITY n. the state of being monosyllabic, also MONOSYLLABISM.
NEUROPSYCHIATRYneuropsychiatry n. (Medicine) The branch of medicine dealing with disorders that have both neurological and psychiatric features.
NEUROPSYCHIATRY n. a branch of medicine concerned with both neurology and psychiatry.
NONHYSTERICALLYSorry, definition not available.
ONYCHOCRYPTOSISonychocryptosis n. (Medicine) ingrowing toenail.
ONYCHOCRYPTOSIS n. the condition of having an ingrowing toenail.
POLYCRYSTALLINEpolycrystalline adj. Composed of an aggregate of very small crystals in random orientations.
POLYCRYSTALLINE adj. consisting of crystals variously oriented.
POLYSYNTHESISMSPOLYSYNTHESISM n. the state of being polysynthetic.
POLYSYNTHETICALpolysynthetical adj. Alternative form of polysynthetic.
POLYSYNTHETICAL adj. made up of many separate elements, also POLYSYNTHETIC.
POLYSYNTHETISMSPOLYSYNTHETISM n. the state of being polysynthetic.
PRESYNAPTICALLYpresynaptically adv. In a presynaptic manner.
PRESYNAPTIC adv. relating to a neuron by which a nerve impulse is conveyed to a synapse.
PSYCHOSYNTHESISpsychosynthesis n. A form of psychology based on the direct experience of the self.
PSYCHOSYNTHESIS n. a form of psychotherapy combining psychoanalytic techniques with meditation and exercise.
PYCNODYSOSTOSISpycnodysostosis n. (Medicine) A genetic disorder characterized by dense, fragile bones and dwarfism.
PYCNODYSOSTOSIS n. a rare inherited bone disease characterized by short stature and thickening and fragility of the bones.
PYKNODYSOSTOSISpyknodysostosis n. Alternative form of pycnodysostosis.
PYKNODYSOSTOSIS n. a rare inherited bone disease characterized by short stature and thickening and fragility of the bones.
SYCOPHANTICALLYsycophantically adv. In a sycophantic manner.
SYCOPHANTICAL adv. (obsolete) sycophantic, also SYCOPHANTIC.
SYNARTHRODIALLYsynarthrodially adv. By means of synarthrosis.
SYNARTHRODIAL adv. of, relating to, or being a synarthrosis.
SYNERGISTICALLYsynergistically adv. In a synergistic manner.
SYNERGISTIC adv. showing synergy.
UNSYMMETRICALLYunsymmetrically adv. In an unsymmetrical way.
UNSYMMETRICAL adv. not symmetrical.

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: 142 words
  • Scrabble in French: 5 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: no word
  • Scrabble in German: no word
  • Scrabble in Romanian: no word


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