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There are 18 nine-letter words containing YDRA

ANHYDRASEanhydrase n. (Chemistry) An enzyme that catalyzes the removal of water from a material.
ANHYDRASE n. an enzyme that catalyses the removal of water.
CLEPSYDRAclepsydra n. A water clock, especially as used in the ancient world.
CLEPSYDRA n. (Greek) an instrument which measures time by trickling water.
DEHYDRATEdehydrate v. To lose or remove water; to dry.
DEHYDRATE v. to dry out, remove the water from.
HYDRACIDShydracids n. Plural of hydracid.
HYDRACID n. an oxygenless acid.
HYDRAEMIAhydraemia n. Thinness of the blood.
hydræmia n. Alternative spelling of hydraemia.
HYDRAEMIA n. an abnormally watery state of the blood, also HYDREMIA.
HYDRAGOGShydragogs n. Plural of hydragog.
HYDRAGOG n. a purgative causing watery discharges.
HYDRANGEAhydrangea n. Any of several shrubs, of the genus Hydrangea, having large clusters of white, pink or blue flowers.
Hydrangea prop.n. A taxonomic genus within the family Hydrangeaceae – the hydrangeas.
HYDRANGEA n. a plant of the Hydrangea genus of shrubby plants.
HYDRANTHShydranths n. Plural of hydranth.
HYDRANTH n. a nutritive zooid in a colony of hydrozoans.
HYDRASTISHYDRASTIS n. any of various Japanese and North American plants, such as goldenseal, having showy foliage and ornamental red fruits.
HYDRATINGhydrating v. Present participle of hydrate.
HYDRATE v. to combine with water.
HYDRATIONhydration n. (Chemistry) The incorporation of water molecules into a complex with those of another compound.
hydration n. (Biology) The process of providing an adequate amount of water to body tissues.
hydration n. (Construction) The chemical reaction by which a substance (such as cement) combines with water, giving…
HYDRATORShydrators n. Plural of hydrator.
HYDRATOR n. something that hydrates.
HYDRAULIChydraulic adj. Pertaining to water.
hydraulic adj. Related to, or operated by, hydraulics.
hydraulic v. (Transitive) To mine using the technique of hydraulic mining.
HYDRAZIDEhydrazide n. (Chemistry) any compound derived from an oxoacid by replacing the hydroxide group with -NHNH2 or derived…
HYDRAZIDE n. any of a class of compounds resulting from the replacement of hydrogen by an acid group or in one of its derivatives.
HYDRAZINEhydrazine n. (Inorganic chemistry, uncountable) A corrosive, fuming liquid, NH2-NH2, used as a rocket fuel.
hydrazine n. (Organic chemistry, countable) Any member of the class of organic compounds formally derived from NH…
HYDRAZINE n. a colourless basic liquid made from sodium hypochlorite and ammonia, used chiefly as a rocket fuel.
HYDRAZOIChydrazoic adj. (Inorganic chemistry) Of or pertaining to hydrazoic acid.
HYDRAZOIC adj. as in hydrazoic acid, a colourless highly explosive liquid.
REHYDRATErehydrate v. To resupply with water that has been removed or lost; to moisten something that has dried.
REHYDRATE v. to add water to (a dehydrated substance).
WALLYDRAGWALLYDRAG n. (Scots) a feeble, imperfectly developed, or slovenly creature, also WALLYDRAIGLE.

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: 39 words
  • Scrabble in French: 21 words
  • Scrabble in Spanish: no word
  • Scrabble in Italian: no word
  • Scrabble in German: 5 words
  • Scrabble in Romanian: no word


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