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There are 17 words beginning with PENTO

PENTODE	• pentode n. A thermionic valve similar to a tetrode with the addition of a third grid, the suppressor grid to reduce… • PENTODE n. a type of electron tube.
PENTOSE	• pentose n. (Biochemistry) A sugar or saccharide containing five carbon atoms. • PENTOSE n. a sugar with five carbon atoms per molecule.
PENTODES	• pentodes n. Plural of pentode. • PENTODE n. a type of electron tube.
PENTOMIC	• pentomic adj. Pertaining to or exhibiting the concept of structuring a division (military formation) such that it… • PENTOMIC adj. of an army division, formed in five units, esp. when using atomic weapons.
PENTOSAN	• pentosan n. (Biochemistry) Any polysaccharide composed of pentoses. • PENTOSAN n. a complex carbohydrate found in cellulose, also PENTOSANE.
PENTOSES	• pentoses n. Plural of pentose. • PENTOSE n. a sugar with five carbon atoms per molecule.
PENTOSANE	• pentosane n. Alternative form of pentosan. • PENTOSANE n. a complex carbohydrate found in cellulose, also PENTOSAN.
PENTOSANS	• pentosans n. Plural of pentosan. • PENTOSAN n. a complex carbohydrate found in cellulose, also PENTOSANE.
PENTOSIDE	• pentoside n. (Organic chemistry) Any glycoside derived from a pentose. • PENTOSIDE n. a compound containing sugar.
PENTOXIDE	• pentoxide n. (Inorganic chemistry) any oxide containing five oxygen atoms in each molecule. • PENTOXIDE n. an oxide containing five atoms of oxygen in each molecule; as, phosphorus pentoxide.
PENTOSANES	• pentosanes n. Plural of pentosane. • PENTOSANE n. a complex carbohydrate found in cellulose, also PENTOSAN.
PENTOSIDES	• pentosides n. Plural of pentoside. • PENTOSIDE n. a compound containing sugar.
PENTOXIDES	• pentoxides n. Plural of pentoxide. • PENTOXIDE n. an oxide containing five atoms of oxygen in each molecule; as, phosphorus pentoxide.
PENTOBARBITAL	• pentobarbital n. (Pharmacology) A narcotic and sedative barbiturate drug (trademark Nembutal) formerly used to relieve insomnia. • PENTOBARBITAL n. a barbiturate drug with hypnotic, sedative, and anticonvulsant effects, also PENTABARBITAL.
PENTOBARBITALS	• pentobarbitals n. Plural of pentobarbital. • PENTOBARBITAL n. a barbiturate drug with hypnotic, sedative, and anticonvulsant effects, also PENTABARBITAL.
PENTOBARBITONE	• pentobarbitone n. Pentobarbital (sodium salt). • PENTOBARBITONE n. a barbiturate drug, with hypnotic, sedative, and anticonvulsant effects.
PENTOBARBITONES	• pentobarbitones n. Plural of pentobarbitone. • PENTOBARBITONE n. a barbiturate drug, with hypnotic, sedative, and anticonvulsant effects.

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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English Wiktionary: 62 words
Scrabble in French: 4 words
Scrabble in Spanish: 2 words
Scrabble in Italian: 31 words
Scrabble in German: 2 words
Scrabble in Romanian: 22 words

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