| AMINOBUTENES | • AMINOBUTENE n. a synthetic pain-relieving drug, less addictive than morphine. | 
| BARQUENTINES | • barquentines n. Plural of barquentine. • BARQUENTINE n. a three-masted vessel, with the foremast square-rigged, and the mainmast and mizzenmast fore-and-aft-rigged, also BARKANTINE, BARKENTINE, BARQUANTINE.
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| BOUTONNIERES | • boutonnieres n. Plural of boutonniere. • boutonnières n. Plural of boutonnière.
 • BOUTONNIERE n. (French) a flower for the buttonhole, etc.
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| BREUNNERITES | • BREUNNERITE n. an iron-containing type of magnesite used in the manufacture of refractory bricks. | 
| ENCUMBERMENT | • encumberment n. Encumbrance. • ENCUMBERMENT n. the act of encumbering; the state of being encumbered.
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| MOUNTEBANKED | • mountebanked v. Simple past tense and past participle of mountebank. • MOUNTEBANK v. to act as a mountebank.
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| SUBSENTENCES | • subsentences n. Plural of subsentence. • SUBSENTENCE n. part of a sentence.
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| SUBTENANCIES | • subtenancies n. Plural of subtenancy. • SUBTENANCY n. the state of being a subtenant, one who rents a tenement, or land, etc.
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| SUBTERRANEAN | • subterranean adj. Below ground, under the earth, underground. • subterranean adj. (By extension) Secret, concealed.
 • SUBTERRANEAN adj. underground.
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| UNBENEFITTED | • unbenefitted adj. Alternative form of unbenefited. • UNBENEFITTED adj. (US) (of a job) not accompanied by benefits such as paid leave or medical insurance, also UNBENEFITED.
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| UNDERBLANKET | • underblanket n. A blanket placed directly on the mattress of a bed. • UNDERBLANKET n. a blanket for use under another blanket.
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| UNLISTENABLE | • unlistenable adj. (Music, acoustics) Of a sound quality or characteristic that a person cannot long listen to. • UNLISTENABLE adj. not listenable.
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| UNNEGOTIABLE | • unnegotiable adj. Not negotiable. • UNNEGOTIABLE adj. not negotiable.
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| UNNOTICEABLE | • unnoticeable adj. Not noticeable. • UNNOTICEABLE adj. not capable of being noticed.
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| UNPATENTABLE | • unpatentable adj. (Law) Not patentable; that cannot be patented. • UNPATENTABLE adj. not patentable.
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| UNRETURNABLE | • unreturnable adj. That is not able to be returned. • unreturnable adj. That is not designed to be returned; nonreturnable.
 • UNRETURNABLE adj. not returnable.
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| UNSTABLENESS | • unstableness n. The quality of being unstable; instability. • UNSTABLENESS n. the state of being unstable.
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| UNTENANTABLE | • untenantable adj. (Property) Unliveable-in or unuseful in its present state to purchaser, tenant or vendor. • UNTENANTABLE adj. not tenantable.
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| WINTERBOURNE | • winterbourne n. (Britain) A stream that only flows in winter or after wet weather, particularly in an area rich in limestone. • Winterbourne prop.n. Any of several villages in Britain.
 • Winterbourne prop.n. A surname from Old English.
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