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List of 12-letter words containing

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There are 17 twelve-letter words containing A, C, E, 2H, M and R

ARCHIPHONEMEarchiphoneme n. (Phonology) A unit representing two or more underlying phonemes, where the distinction between them…
ARCHIPHONEME n. an abstract linguistic unit representing two or more phonemes when the distinction between these has been neutralized, conventionally shown by a capital letter within slashes.
BATHOCHROMESBATHOCHROME n. a shift to a longer wavelength in the absorption spectrum of a compound.
CHAMBERHANDSCHAMBERHAND n. (New Zealand) a worker in the cold storage area of a slaughterhouse.
CHEMOAUTROPHCHEMOAUTROPH n. any organism, e.g. bacteria, that produces energy by the oxidation of inorganic compounds, such as iron, ammonia and hydrogen sulphide, also CHEMOAUTOTROPH.
CHEMOTHERAPYchemotherapy n. (Medicine) Any chemical treatment intended to be therapeutic with respect to a disease state.
chemotherapy n. (Oncology, most common usage) chemical treatment to kill or halt the replication and/or spread of cancerous…
CHEMOTHERAPY n. therapy involving the use of chemicals.
CHLORENCHYMAchlorenchyma n. (Botany) A mechanical, supportive ground tissue in plants containing chloroplasts.
CHLORENCHYMA n. plant stem tissue containing chlorophyll.
CHRESTOMATHYchrestomathy n. A collection of written passages, used to learn an unfamiliar language.
chrestomathy n. A collection of choice passages from an author or authors.
CHRESTOMATHY n. a selection of passages compiled as an aid to learning a language; a volume of selected passages or stories of an author.
EURHYTHMICALeurhythmical adj. Harmonious.
EURHYTHMICAL adj. relating to eurhythmy, rhythmical movement or order, also EURHYTHMIC, EURYTHMIC, EURYTHMICAL.
HAEMACHROMESHAEMACHROME n. a blood pigment, such as haemoglobin, that carries oxygen, also HEMACHROME.
HAEMOCHROMESHAEMOCHROME n. a blood pigment, such as haemoglobin, that carries oxygen, also HEMOCHROME.
HAEMORRHAGIChaemorrhagic adj. (Chiefly British spelling) Alternative spelling of hemorrhagic.
hæmorrhagic adj. (Chiefly British spelling) Obsolete spelling of hemorrhagic.
HAEMORRHAGIC adj. relating to haemorrhage, also HEMORRHAGIC.
HAMMERCLOTHShammercloths n. Plural of hammercloth.
hammer-cloths n. Plural of hammer-cloth.
HAMMERCLOTH n. a cloth covering a coach box.
HEMICHORDATEhemichordate n. (Biology) Any of many marine worms, of the phylum Hemichordata, that have a primitive notochord.
hemichordate adj. Of, pertaining to, or characteristic of these animals.
HEMICHORDATE n. a kind of marine worm.
HIERARCHISMShierarchisms n. Plural of hierarchism.
HIERARCHISM n. a hierarchical system.
MEGACHURCHESmegachurches n. Plural of megachurch.
mega-churches n. Plural of mega-church.
MEGACHURCH n. a church, usually Protestant, with a very large congregation, typically housed in a complex offering sophisticated multimedia presentations and a range of secular facilities and services.
NYCHTHEMERALnychthemeral adj. Lasting a nychthemeron (24 hours).
NYCHTHEMERAL adj. (Greek) of or relating to a nychthemeron or 24-hour period.
RHAMPHOTHECArhamphotheca n. A thin horny sheath of keratin on the outer surface of a bird’s beak.
RHAMPHOTHECA n. the horny or leathery outer layer of a bird's bill.

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 WikWik.org and 1Word.ws.

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