| barnacle | (noun) marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces | Synonyms: cirriped, cirripede |
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| (noun) European goose smaller than the brant; breeds in the far north | Synonyms: barnacle goose, Branta leucopsis |
| binnacle | (noun) a nonmagnetic housing for a ship's compass (usually in front of the helm) | - |
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| coracle | (noun) a small rounded boat made of hides stretched over a wicker frame; still used in some parts of Great Britain | - |
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| debacle | (noun) a sound defeat | Synonyms: drubbing, slaughter, thrashing, trouncing, walloping, whipping |
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| (noun) a sudden and violent collapse | Synonyms: fiasco |
| (noun) flooding caused by a tumultuous breakup of ice in a river during the spring or summer | - |
| manacle | (noun) shackle that consists of a metal loop that can be locked around the wrist; usually used in pairs | Synonyms: cuff, handcuff, handlock |
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| miracle | (noun) any amazing or wonderful occurrence | - |
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| (noun) a marvellous event manifesting a supernatural act of a divine agent | - |
| obstacle | (noun) an obstruction that stands in the way (and must be removed or surmounted or circumvented) | - |
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| (noun) something immaterial that stands in the way and must be circumvented or surmounted | Synonyms: obstruction |
| oracle | (noun) a shrine where an oracular god is consulted | - |
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| (noun) a prophecy (usually obscure or allegorical) revealed by a priest or priestess; believed to be infallible | - |
| (noun) an authoritative person who divines the future | Synonyms: prophesier, prophet, seer, vaticinator |
| pentacle | (noun) a star with 5 points; formed by 5 straight lines between the vertices of a pentagon and enclosing another pentagon | Synonyms: pentagram, pentangle |
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| pinnacle | (noun) (architecture) a slender upright spire at the top of a buttress or tower | - |
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| (noun) a lofty peak | - |
| (noun) the highest level or degree attainable; the highest stage of development | Synonyms: acme, elevation, height, meridian, peak, summit, superlative, tiptop, top |
| receptacle | (noun) a container that is used to put or keep things in | - |
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| (noun) an electrical (or electronic) fitting that is connected to a source of power and equipped to receive an insert | - |
| (noun) enlarged tip of a stem that bears the floral parts | - |
| spectacle | (noun) a blunder that makes you look ridiculous; used in the phrase `make a spectacle of' yourself | - |
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| (noun) an elaborate and remarkable display on a lavish scale | - |
| (noun) something or someone seen (especially a notable or unusual sight) | - |
| spiracle | (noun) a breathing orifice | - |
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| tabernacle | (noun) (Judaism) the place of worship for a Jewish congregation | Synonyms: synagogue, temple |
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| tentacle | (noun) any of various elongated tactile or prehensile flexible organs that occur on the head or near the mouth in many animals; used for feeling or grasping or locomotion | - |
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| (noun) something that acts like a tentacle in its ability to grasp and hold | - |
| treacle | (noun) writing or music that is excessively sweet and sentimental | Synonyms: glop, mush, slop |
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| (noun) a pale cane syrup | Synonyms: golden syrup |