| borough | (noun) one of the administrative divisions of a large city | - |
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| (noun) an English town that forms the constituency of a member of parliament | - |
| bough | (noun) any of the larger branches of a tree | - |
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| breakthrough | (noun) a penetration of a barrier such as an enemy's defense | - |
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| (noun) making an important discovery | - |
| (noun) a productive insight | Synonyms: discovery, find |
| chough | (noun) a European corvine bird of small or medium size with red legs and glossy black plumage | - |
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| cough | (noun) a sudden noisy expulsion of air from the lungs that clears the air passages; a common symptom of upper respiratory infection or bronchitis or pneumonia or tuberculosis | Synonyms: coughing |
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| dough | (noun) a flour mixture stiff enough to knead or roll | - |
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| (noun) informal terms for money | Synonyms: boodle, bread, cabbage, clams, dinero, gelt, kale, lettuce, lolly, loot, lucre, moolah, pelf, scratch, shekels, simoleons, sugar, wampum |
| enough | (noun) an adequate quantity; a quantity that is large enough to achieve a purpose | Synonyms: sufficiency |
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| furlough | (noun) a temporary leave of absence from military duty | - |
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| hiccough | (noun) (usually plural) the state of having reflex spasms of the diaphragm accompanied by a rapid closure of the glottis producing an audible sound; sometimes a symptom of indigestion | Synonyms: hiccup, singultus |
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| lough | (noun) Irish word for a lake | - |
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| (noun) a long narrow (nearly landlocked) cove in Ireland | - |
| plough | (noun) a farm tool having one or more heavy blades to break the soil and cut a furrow prior to sowing | Synonyms: plow |
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| rough | (noun) the part of a golf course bordering the fairway where the grass is not cut short | - |
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| slough | (noun) any outer covering that can be shed or cast off (such as the cast-off skin of a snake) | - |
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| (noun) necrotic tissue; a mortified or gangrenous part or mass | Synonyms: gangrene, sphacelus |
| (noun) a stagnant swamp (especially as part of a bayou) | - |
| (noun) a hollow filled with mud | - |
| snowplough | (noun) a vehicle used to push snow from roads | Synonyms: snowplow |
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| sourdough | (noun) a settler or prospector (especially in western United States or northwest Canada and Alaska) | - |
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| (noun) a leaven of dough in which fermentation is active; used by pioneers for making bread | - |
| tough | (noun) an aggressive and violent young criminal | Synonyms: goon, hood, hoodlum, punk, strong-armer, thug, toughie |
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| (noun) a cruel and brutal fellow | Synonyms: bully, hooligan, roughneck, rowdy, ruffian, yob, yobbo, yobo |
| (noun) someone who learned to fight in the streets rather than being formally trained in the sport of boxing | Synonyms: street fighter |
| trough | (noun) a channel along the eaves or on the roof; collects and carries away rainwater | Synonyms: gutter |
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| (noun) a container (usually in a barn or stable) from which cattle or horses feed | Synonyms: manger |
| (noun) a long narrow shallow receptacle | - |
| (noun) a narrow depression (as in the earth or between ocean waves or in the ocean bed) | - |
| (noun) a treasury for government funds | Synonyms: public treasury, till |
| (noun) a concave shape with an open top | Synonyms: bowl |