List of 13-letter words containing ••••••

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There are 17 thirteen-letter words containing 2N, 3O, P and R

GONADOTROPHIN	• gonadotrophin n. Any of a group of protein hormones secreted by gonadotrope cells of the pituitary gland of vertebrates. • GONADOTROPHIN n. a substance that stimulates the gonads.
GONADOTROPINS	• gonadotropins n. Plural of gonadotropin. • GONADOTROPIN n. a gonadotropic hormone, as follicle-stimulating hormone.
INCORPORATION	• incorporation n. The act of incorporating, or the state of being incorporated. • incorporation n. The union of different ingredients in one mass; mixture; combination; synthesis. • incorporation n. The union of something with a body already existing; association; intimate union; assimilation.
NINCOMPOOPERY	• nincompoopery n. The beliefs and behaviours of a nincompoop; folly; idiocy. • NINCOMPOOPERY n. the state of being a nincompoop.
NONCOMPETITOR	• noncompetitor n. One who is not a competitor. • NONCOMPETITOR n. one who is not a competitor.
NONCOOPERATOR	• noncooperator n. A person who does not cooperate. • NONCOOPERATOR n. one who does not cooperate.
ODONTOPHORANS	• ODONTOPHORAN n. an odontophore, the rasping apparatus in molluscs.
ONYCHOPHORANS	• onychophorans n. Plural of onychophoran. • ONYCHOPHORAN n. any of numerous velvety-skinned wormlike carnivorous animals common in tropical forests having characteristics of both arthropods and annelid worms.
OPPIGNORATION	• oppignoration n. (Obsolete) The act of pawning or laying in pledge. • OPPIGNORATION n. the act of pawning, also OPPIGNERATION.
PHOTONEUTRONS	• photoneutrons n. Plural of photoneutron. • PHOTONEUTRON n. a neutron emitted from a nucleus as a result of photodisintegration.
POGONOPHORANS	• pogonophorans n. Plural of pogonophoran. • POGONOPHORAN n. any of a phylum Pogonophora of marine wormlike animals.
PROLONGATIONS	• prolongations n. Plural of prolongation. • PROLONGATION n. the act of prolonging.
PROPORTIONING	• proportioning v. Present participle of proportion. • PROPORTIONING n. an adjustment of proportions.
RONTGENOSCOPE	• RONTGENOSCOPE n. an apparatus for examining patients by use of X-rays, also ROENTGENOSCOPE.
RONTGENOSCOPY	• RONTGENOSCOPY n. observation by means of X-rays.
SOUNDPROOFING	• soundproofing v. Present participle of soundproof. • soundproofing n. Something that prevents sound from traveling through it, such as is put on walls so adjacent areas are… • soundproofing n. The act of installing material to dampen sound.
SPOROPOLLENIN	• sporopollenin n. (Botany) A combination of biopolymers, observed in the exine layer of the spore and pollen wall. • SPOROPOLLENIN n. a polymer that comprises the exine (outer layer of the wall) of spores and pollen grains.

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: 148 words
Scrabble in French: 56 words
Scrabble in Spanish: 33 words
Scrabble in Italian: 176 words
Scrabble in German: no word
Scrabble in Romanian: 20 words

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