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List of 13-letter words containing

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There are 9 thirteen-letter words containing G, H, 2I and 3O

OLIGOTROPHIESOLIGOTROPHY n. the state of being oligotrophic.
ORCHIDOLOGIESORCHIDOLOGY n. the study of orchids.
ORCHIDOLOGISTorchidologist n. One who studies orchids.
ORCHIDOLOGIST n. one who studies orchids.
ORNITHOLOGIESornithologies n. Plural of ornithology.
ORNITHOLOGY n. the study of birds.
ORNITHOLOGISTornithologist n. A person who studies or practices ornithology.
ORNITHOLOGIST n. one who studies birds.
PHOTOBIOLOGICphotobiologic adj. Synonym of photobiological.
PHOTOBIOLOGIC adj. relating to photobiology, also PHOTOBIOLOGICAL.
PHOTOIONISINGPHOTOIONISE v. to ionize by electromagnetic radiation, also PHOTOIONIZE.
PHOTOIONIZINGphotoionizing adj. That causes or undergoes photoionization.
PHOTOIONIZE v. to ionize by electromagnetic radiation, also PHOTOIONISE.
STOICHEIOLOGYSTOICHEIOLOGY n. the branch of biology that deals with the elements comprising animal tissues, also STOECHIOLOGY.

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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