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There are 16 fifteen-letter words containing H, L, O, P, 2R, S and Y

AEROHYDROPLANESAEROHYDROPLANE n. a winged hydroplane or flying-boat.
CRYSTALLOGRAPHYcrystallography n. The experimental science of determining the arrangement of atoms in solids.
crystallography n. The study of crystals.
CRYSTALLOGRAPHY n. a science that deals with the forms and structures of crystals.
DACTYLOGRAPHERSDACTYLOGRAPHER n. one who studies fingerprints.
HYDROSULPHUROUSHYDROSULPHUROUS adj. as in hydrosulphurous acid.
HYDROXYPROLINEShydroxyprolines n. Plural of hydroxyproline.
HYDROXYPROLINE n. an amino acid.
HYPERPOLARISINGhyperpolarising v. Present participle of hyperpolarise.
HYPERPOLARISE v. to increase the difference in electric potential across a cell membrane, also HYPERPOLARIZE.
MICROSPOROPHYLLmicrosporophyll n. A leaflike organ that bears one or more microsporangia (contrast megasporophyll or macrosporophyll).
MICROSPOROPHYLL n. a specialised leaf bearing or subtending one or more microsporangia.
PEROXYSULPHURICPEROXYSULPHURIC adj. as in peroxysulphuric acid.
POLYARTHRITIDESpolyarthritides n. Plural of polyarthritis.
POLYARTHRITIS n. arthritis affecting several joints.
POLYARTHRITISESPOLYARTHRITIS n. arthritis affecting several joints.
PREHISTORICALLYprehistorically adv. In a prehistoric manner.
prehistorically adv. Regarding prehistory.
PREHISTORICAL adv. relating to the time before historical records, also PREHISTORIC.
PSYCHROMETRICALpsychrometrical adj. Psychrometric.
PSYCHROMETRICAL adj. relating to measurement by psychrometer, also PSYCHOMETRIC, PSYCHOMETRICAL, PSYCHROMETRIC.
PTERYLOGRAPHIESpterylographies n. Plural of pterylography.
PTERYLOGRAPHY n. a description of pterylae.
SPHAEROCRYSTALSsphaerocrystals n. Plural of sphaerocrystal.
SPHAEROCRYSTAL n. a rounded crystalline mass.
STAPHYLORRHAPHYstaphylorrhaphy n. The operation of uniting a cleft palate by paring and bringing together the edges of the cleft.
STAPHYLORRHAPHY n. the operation of uniting a cleft palate.
ULTRASONOGRAPHYultrasonography n. (Medicine) The use of ultrasound to produce diagnostic images of the internal organs of the body, or of a foetus.
ultrasonography n. The use of ultrasound to form images of underwater structures.
ULTRASONOGRAPHY n. the use of ultrasound.

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: 71 words
  • Scrabble in French: 9 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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