| adder | (noun) small terrestrial viper common in northern Eurasia | Synonyms: common viper, Vipera berus |
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| (noun) a machine that adds numbers | - |
| (noun) a person who adds numbers | - |
| bedder | (noun) an ornamental plant suitable for planting in a flowerbed | Synonyms: bedding plant |
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| bidder | (noun) someone who makes an offer | - |
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| (noun) someone who makes a bid at cards | - |
| bladder | (noun) a bag that fills with air | - |
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| (noun) a distensible membranous sac (usually containing liquid or gas) | Synonyms: vesica |
| bladdernose | (noun) medium-sized blackish-grey seal with large inflatable sac on the head; of Arctic and northern Atlantic waters | Synonyms: Cystophora cristata, hooded seal |
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| bladderpod | (noun) any of several hairy North American herbs having yellow racemose flowers and inflated pods | - |
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| (noun) any of several plants of the genus Physaria having racemose yellow flowers and inflated pods | - |
| (noun) annual or perennial herbs with inflated seed pods; some placed in genus Lesquerella | - |
| (noun) North American wild lobelia having small blue flowers and inflated capsules formerly used as an antispasmodic | Synonyms: Indian tobacco, Lobelia inflata |
| bladderwort | (noun) any of numerous aquatic carnivorous plants of the genus Utricularia some of whose leaves are modified as small urn-shaped bladders that trap minute aquatic animals | - |
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| bladderwrack | (noun) a common rockweed used in preparing kelp and as manure | Synonyms: black rockweed, bladder fucus, Fucus vesiculosus, tang |
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| (noun) similar to and found with black rockweed | Synonyms: Ascophyllum nodosum |
| dodder | (noun) a leafless annual parasitic vine of the genus Cuscuta having whitish or yellow filamentous stems; obtain nourishment through haustoria | - |
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| dodderer | (noun) one who dodders from old age and weakness | - |
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| fodder | (noun) coarse food (especially for livestock) composed of entire plants or the leaves and stalks of a cereal crop | - |
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| (noun) soldiers who are regarded as expendable in the face of artillery fire | Synonyms: cannon fodder, fresh fish |
| gallbladder | (noun) a muscular sac attached to the liver that stores bile (secreted by the liver) until it is needed for digestion | Synonyms: gall bladder |
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| ladder | (noun) steps consisting of two parallel members connected by rungs; for climbing up or down | - |
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| (noun) a row of unravelled stitches | Synonyms: ravel, run |
| (noun) ascending stages by which somebody or something can progress | - |
| madder | (noun) Eurasian herb having small yellow flowers and red roots formerly an important source of the dye alizarin | Synonyms: Rubia tinctorum |
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| madderwort | (noun) any of numerous trees or shrubs or vines of the family Rubiaceae | Synonyms: rubiaceous plant |
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| mudder | (noun) a racehorse that runs well on a muddy racetrack | - |
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| padder | (noun) a highwayman who robs on foot | Synonyms: footpad |
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| plodder | (noun) someone who moves slowly | Synonyms: slowcoach, slowpoke, stick-in-the-mud |
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| (noun) someone who works slowly and monotonously for long hours | Synonyms: slogger |
| (noun) someone who walks in a laborious heavy-footed manner | Synonyms: slogger, trudger |
| rudder | (noun) (nautical) steering mechanism consisting of a hinged vertical plate mounted at the stern of a vessel | - |
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| (noun) a hinged vertical airfoil mounted at the tail of an aircraft and used to make horizontal course changes | - |
| rudderfish | (noun) fish having the habit of following ships; found in North American and South American coastal waters | Synonyms: banded rudderfish, Seriola zonata |
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| (noun) food and game fish around Bermuda and Florida; often follow ships | Synonyms: Bermuda chub, Kyphosus sectatrix |
| rudderpost | (noun) a vertical post at the forward edge of a rudder that enables the rudder to pivot | Synonyms: rudderstock |
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| rudderstock | (noun) a vertical post at the forward edge of a rudder that enables the rudder to pivot | Synonyms: rudderpost |
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| shedder | (noun) an attacker who sheds or spills blood | Synonyms: spiller |
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| shredder | (noun) a device that shreds documents (usually in order to prevent the wrong people from reading them) | - |
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| shudder | (noun) an involuntary vibration (as if from illness or fear) | Synonyms: tremor |
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| (noun) an almost pleasurable sensation of fright | Synonyms: chill, frisson, quiver, shiver, thrill, tingle |
| skidder | (noun) a tractor used to haul logs over rough terrain | - |
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| (noun) a worker who uses a skid to move logs | - |
| (noun) a person who slips or slides because of loss of traction | Synonyms: slider, slipper |
| sledder | (noun) someone who rides a sled | - |
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| stepladder | (noun) a folding portable ladder hinged at the top | Synonyms: step ladder |
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| udder | (noun) mammary gland of bovids (cows and sheep and goats) | Synonyms: bag |
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