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There are 10 twelve-letter words containing D, H, I, 2O, 2R and T

HYDROTROPISMhydrotropism n. (Biology) The movement of a plant (or other organism) in response to water, either towards or away from water.
HYDROTROPISM n. growth in the direction of water.
ORTHODROMICSorthodromics n. Orthodromic navigation.
ORTHODROMICS n. the act or art of sailing on a great circle, also ORTHODROMY.
ORTHODROMIESORTHODROMY n. the act or art of sailing on a great circle, also ORTHODROMICS.
ORTHOPTEROIDorthopteroid n. (Entomology) Any of the insects historically included in the order Orthoptera, including the cockroaches…
ORTHOPTEROID n. a member of the Orthoptera, cockroaches.
PYRITOHEDRONpyritohedron n. (Mathematics) An irregular dodecahedron, the faces of which are identical but irregular pentagons.
pyritohedron n. (Mineralogy) The shape of one of the crystal habits of pyrite.
PYRITOHEDRON n. a pentagonal dodecahedron.
RADIOTHORIUMradiothorium n. (Physics) The radioactive isotope thorium-228.
RADIOTHORIUM n. a radioactive isotope of thorium with the mass number 228.
ROADWORTHIERROADWORTHY adj. able to be used on a road.
ROADWORTHIESROADWORTHY n. in South Africa, a certificate for a roadworthy vehicle.
THIRDBOROUGHthirdborough n. (Obsolete) The head of a frankpledge.
thirdborough n. (Obsolete) The constable of a tithing or township.
THIRDBOROUGH n. (historical) an under-constable.
TRAITORHOODSTRAITORHOOD n. the state of being a traitor.

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: 50 words
  • Scrabble in French: 6 words
  • Scrabble in Spanish: 8 words
  • Scrabble in Italian: 7 words
  • Scrabble in German: no word
  • Scrabble in Romanian: 13 words


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