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There are 19 twelve-letter words containing A, E, H, M, N, O, S and Y

COENENCHYMASCOENENCHYMA n. gelatinous material uniting the polyps of an anthozoan colony.
COLLENCHYMAScollenchymas n. Plural of collenchyma.
COLLENCHYMA n. the supportive tissue of plants.
DYSMENORRHEAdysmenorrhea n. (Medicine) Painful menstruation (menstrual#Adjective pain), viewed as a symptom#Noun in any of various disorders.
dysmenorrhea n. (Medicine) Painful menstruation (menstrual#Adjective pain), viewed as a disorder#Noun in its own right…
DYSMENORRHEA n. painful menstruation, also DYSMENORRHOEA.
HAEMOCYANINShaemocyanins n. Plural of haemocyanin.
HAEMOCYANIN n. an oxygen-carrying pigment in arachnids, equivalent to haemoglobin in mammals.
HEMATOXYLINShematoxylins n. Plural of hematoxylin.
HEMATOXYLIN n. a dye obtained from logwood, also HAEMATOXYLIN.
HEMODYNAMICShemodynamics n. (Medicine) The circulation and movement of blood in the body, and the forces involved therein.
HEMODYNAMICS n. a branch of physiology that deals with the circulation of the blood, also HAEMODYNAMICS.
HYALOMELANESHYALOMELANE n. a vitreous form of basalt, aka tachylite, also HYALOMELAN.
HYDROMANCERShydromancers n. Plural of hydromancer.
HYDROMANCER n. one who practises hydromancy.
HYDROMANCIEShydromancies n. Plural of hydromancy.
HYDROMANCY n. divination by the appearance or motion of liquids (as water).
HYDROMEDUSANhydromedusan adj. (Zoology) Relating to the hydromedusas.
HYDROMEDUSAN n. a hydromedusa, also HYDROMEDUSA, HYDROMEDUSOID.
HYMENOPLASTYhymenoplasty n. (Medicine) Plastic surgery affecting a woman’s hymen, usually involving reconstruction to the unbroken…
HYMENOPLASTY n. surgical reconstruction of the hymen to give the appearance of virginity, usually for religious or cultural reasons.
HYOSCYAMINEShyoscyamines n. Plural of hyoscyamine.
HYOSCYAMINE n. a drug obtained from henbane.
HYPERSOMNIAShypersomnias n. Plural of hypersomnia.
HYPERSOMNIA n. a pathological tendency to sleep excessively.
HYSTEROMANIAhysteromania n. (Archaic) nymphomania.
hysteromania n. (Archaic) A condition involving both hysteria and mania.
HYSTEROMANIA n. hysterical mania, often marked by erotic delusions and an excessive desire to attract attention.
LYMPHOPENIASlymphopenias n. Plural of lymphopenia.
LYMPHOPENIA n. an abnormally low level of lymphocytes in the blood.
METHYLATIONSmethylations n. Plural of methylation.
METHYLATION n. the process of methylating.
MONOHYDRATESmonohydrates n. Plural of monohydrate.
MONOHYDRATE n. a hydrate containing one molecule of water per molecule of the compound.
PROSENCHYMASPROSENCHYMA n. supporting plant tissue containing little protoplasm.
UNHANDSOMELYunhandsomely adv. In an unhandsome manner.
UNHANDSOME adv. not handsome.

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: 75 words
  • Scrabble in French: 8 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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