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List of 13-letter words containing

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There are 19 thirteen-letter words containing E, H, L, T and 2Y

BUTYRALDEHYDEbutyraldehyde n. (Organic chemistry) The aliphatic aldehyde CH3-CH2-CH2-CHO derived from butane.
BUTYRALDEHYDE n. either of two aldehydes used esp. in making synthetic resins.
CYANOETHYLATEcyanoethylate v. (Chemistry, transitive) To subject to cyanoethylation.
CYANOETHYLATE v. to introduce a cyano-ethyl group into.
EPIPHYTICALLYepiphytically adv. In an epiphytic manner; in the manner of an epiphyte.
EPIPHYTICAL adv. of or like an epiphyte, also EPIPHYTAL, EPIPHYTIC.
HYPERMOBILITYhypermobility n. An excess amount of elasticity in a bodily joint.
HYPERMOBILITY n. extreme mobility.
HYPERSALINITYhypersalinity n. Abnormally high salinity.
HYPERSALINITY n. excessive salinity.
HYPERVELOCITYhypervelocity adj. Having, or occurring at, extreme velocity.
hypervelocity n. A very high velocity.
hypervelocity n. A hypersonic velocity.
LYMPHOCYTOSESlymphocytoses n. Plural of lymphocytosis.
LYMPHOCYTOSIS n. a great increase in leukocytes.
METHYLMERCURYmethylmercury n. (Chemical compound) The organometallic cation CH3Hg+; it is a toxicant that accumulates in the environment…
methyl␣mercury n. Alternative spelling of methylmercury.
METHYLMERCURY n. any of several extremely toxic organometallic compounds formed from metallic mercury by the action of microorganisms.
PHENYLMETHYLSPHENYLMETHYL n. an ester of benzene, aka benzyl.
POLYCYTHAEMIApolycythaemia n. Alternative spelling of polycythemia.
POLYCYTHAEMIA n. a condition marked by an abnormal increase in the number of circulating red blood cells, also POLYCYTHEMIA.
POLYCYTHEMIASpolycythemias n. Plural of polycythemia.
POLYCYTHEMIA n. a condition marked by an abnormal increase in the number of circulating red blood cells, also POLYCYTHAEMIA.
POLYETHYLENESpolyethylenes n. Plural of polyethylene.
POLYETHYLENE n. a generic name for certain thermoplastics, polymers of ethylene, also POLYTHENE.
POLYSYNTHESESpolysyntheses n. Plural of polysynthesis.
POLYSYNTHESIS n. the state of being polysynthetic.
POLYSYNTHESISpolysynthesis n. The act or process of combining many separate elements into a whole.
polysynthesis n. (Linguistics) The formation of a word by the combination of several simple words; agglutination.
POLYSYNTHESIS n. the state of being polysynthetic.
POLYSYNTHETICpolysynthetic adj. (Grammar, of languages) Characterized by a prevalence of relatively long words containing a large number…
polysynthetic adj. (Mineralogy) Having layers of twin crystals.
POLYSYNTHETIC adj. made up of many separate elements, also POLYSYNTHETICAL.
PTERYLOGRAPHYpterylography n. (Zoology) The study or description of the arrangement of feathers, or of the pterylae, of birds.
PTERYLOGRAPHY n. a description of pterylae.
PYROPHYLLITESpyrophyllites n. Plural of pyrophyllite.
PYROPHYLLITE n. a silvery-white to pale-green aluminum silicate.
SYNTHETICALLYsynthetically adv. Using synthetic methods.
SYNTHETICAL adv. artificially produced but of similar nature to, not a mere substitute for, the natural product, also SYNTHETIC.
TACHYPHYLAXEStachyphylaxes n. Plural of tachyphylaxis.
TACHYPHYLAXIS n. very rapid development of tolerance or immunity to the effects of a drug.

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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See this list for:

  • English Wiktionary: 149 words
  • Scrabble in French: 11 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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