| alumroot | (noun) any of several herbs of the genus Heuchera | Synonyms: alumbloom |
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| anteroom | (noun) a large entrance or reception room or area | Synonyms: antechamber, entrance hall, foyer, hall, lobby, vestibule |
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| arrowroot | (noun) white-flowered West Indian plant whose root yields arrowroot starch | Synonyms: American arrowroot, Maranta arundinaceae, obedience plant |
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| (noun) canna grown especially for its edible rootstock from which arrowroot starch is obtained | Synonyms: achira, Canna edulis, Canna indica, indian shot |
| (noun) a nutritive starch obtained from the root of the arrowroot plant | - |
| backroom | (noun) the meeting place of a group of leaders who make their decisions via private negotiations | - |
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| ballroom | (noun) large room used mainly for dancing | Synonyms: dance hall, dance palace |
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| balsamroot | (noun) a plant of the genus Balsamorhiza having downy leaves in a basal rosette and yellow flowers and long balsam-scented taproots | - |
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| barroom | (noun) a room or establishment where alcoholic drinks are served over a counter | Synonyms: bar, ginmill, saloon, taproom |
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| bathroom | (noun) a room (as in a residence) containing a bathtub or shower and usually a washbasin and toilet | - |
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| (noun) a room or building equipped with one or more toilets | Synonyms: can, john, lav, lavatory, privy, toilet |
| bedroom | (noun) a room used primarily for sleeping | Synonyms: bedchamber, chamber, sleeping accommodation, sleeping room |
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| beetroot | (noun) round red root vegetable | Synonyms: beet |
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| (noun) beet having a massively swollen red root; widely grown for human consumption | Synonyms: Beta vulgaris rubra |
| birthroot | (noun) trillium of eastern North America having malodorous pink to purple flowers and an astringent root used in folk medicine especially to ease childbirth | Synonyms: purple trillium, red trillium, Trillium erectum |
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| bitterroot | (noun) showy succulent ground-hugging plant of Rocky Mountains regions having deep to pale pink flowers and fleshy farinaceous roots; the Montana state flower | Synonyms: Lewisia rediviva |
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| bloodroot | (noun) perennial woodland native of North America having a red root and red sap and bearing a solitary lobed leaf and white flower in early spring and having acrid emetic properties; rootstock used as a stimulant and expectorant | Synonyms: puccoon, redroot, Sanguinaria canadensis, tetterwort |
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| boardroom | (noun) a room where a committee meets (such as the board of directors of a company) | Synonyms: council chamber |
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| bombproof | (adjective) able to resist the explosive force of bombs and shells | Synonyms: shellproof |
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| (noun) a chamber (often underground) reinforced against bombing and provided with food and living facilities; used during air raids | Synonyms: air-raid shelter, bomb shelter |
| (verb) make safe against bombings | - |
| breadroot | (noun) densely hairy perennial of central North America having edible tuberous roots | Synonyms: Indian breadroot, pomme blanche, pomme de prairie, Psoralea esculenta |
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| briarroot | (noun) hard woody root of the briar Erica arborea | - |
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| bridegroom | (noun) a man who has recently been married | Synonyms: groom |
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| (noun) a man participant in his own marriage ceremony | Synonyms: groom |
| brooch | (noun) a decorative pin worn by women | Synonyms: breastpin, broach |
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| (verb) fasten with or as if with a brooch | Synonyms: clasp |
| brood | (noun) the young of an animal cared for at one time | - |
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| (verb) sit on (eggs) | Synonyms: cover, hatch, incubate |
| (verb) think moodily or anxiously about something | Synonyms: dwell |
| (verb) be in a huff; be silent or sullen | Synonyms: grizzle, stew |
| (verb) be in a huff and display one's displeasure | Synonyms: pout, sulk |
| (verb) hang over, as of something threatening, dark, or menacing | Synonyms: bulk large, hover, loom |
| brooder | (noun) apparatus consisting of a box designed to maintain a constant temperature by the use of a thermostat; used for chicks or premature infants | Synonyms: incubator |
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| brooding | (adjective) deeply or seriously thoughtful | Synonyms: broody, contemplative, meditative, musing, pensive, pondering, reflective, ruminative |
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| (noun) persistent morbid meditation on a problem | Synonyms: pensiveness |
| (noun) sitting on eggs so as to hatch them by the warmth of the body | Synonyms: incubation |
| broodmare | (noun) a female horse used for breeding | Synonyms: stud mare |
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| broody | (adjective) physiologically ready to incubate eggs | - |
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| (adjective) deeply or seriously thoughtful | Synonyms: brooding, contemplative, meditative, musing, pensive, pondering, reflective, ruminative |
| (noun) a domestic hen ready to brood | Synonyms: brood hen, broody hen, setting hen, sitter |
| brook | (noun) a natural stream of water smaller than a river (and often a tributary of a river) | Synonyms: creek |
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| (verb) put up with something or somebody unpleasant | Synonyms: abide, bear, digest, endure, put up, stand, stick out, stomach, suffer, support, tolerate |
| brooklet | (noun) a small brook | - |
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| brooklime | (noun) plant of western North America and northeastern Asia having prostrate stems with dense racemes of pale violet to lilac flowers | Synonyms: American brooklime, Veronica americana |
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| (noun) European plant having low-lying stems with blue flowers; sparsely naturalized in North America | Synonyms: European brooklime, Veronica beccabunga |
| brookweed | (noun) water pimpernel of Europe to China | Synonyms: Samolus valerandii |
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| (noun) American water pimpernel | Synonyms: Samolus floribundus, Samolus parviflorus |
| broom | (noun) a cleaning implement for sweeping; bundle of straws or twigs attached to a long handle | - |
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| (noun) any of various shrubs of the genera Cytisus or Genista or Spartium having long slender branches and racemes of yellow flowers | - |
| (noun) common Old World heath represented by many varieties; low evergreen grown widely in the Northern Hemisphere | Synonyms: Calluna vulgaris, heather, ling, Scots heather |
| (verb) sweep with a broom or as if with a broom | Synonyms: sweep |
| (verb) finish with a broom | - |
| broomcorn | (noun) tall grasses grown for the elongated stiff-branched panicle used for brooms and brushes | Synonyms: Sorghum vulgare technicum |
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| broomstick | (noun) the handle of a broom | Synonyms: broom handle |
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| broomweed | (noun) annual of southwestern United States having rigid woody branches with sticky foliage and yellow flowers | Synonyms: broom-weed, Gutierrezia texana |
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| buckaroo | (noun) local names for a cowboy (`vaquero' is used especially in southwestern and central Texas and `buckaroo' is used especially in California) | Synonyms: buckeroo, vaquero |
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| buckeroo | (noun) local names for a cowboy (`vaquero' is used especially in southwestern and central Texas and `buckaroo' is used especially in California) | Synonyms: buckaroo, vaquero |
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| bulletproof | (adjective) not penetrable by bullets | - |
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| (adjective) without flaws or loopholes | Synonyms: ironclad, unassailable, unshakable, watertight |
| (verb) make bulletproof | - |
| burglarproof | (adjective) secure against burglary | - |
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| cardroom | (noun) a room for gambling on card games | - |
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| chatroom | (noun) a site on the internet where a number of users can communicate in real time (typically one dedicated to a particular topic) | Synonyms: chat room |
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| checkroom | (noun) a room where baggage or parcels are checked | Synonyms: left-luggage office |
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| cheroot | (noun) a cigar with both ends cut flat | - |
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| childproof | (verb) make safe against children | Synonyms: child-proof |
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| classroom | (noun) a room in a school where lessons take place | Synonyms: schoolroom |
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| cloakroom | (noun) a room where coats and other articles can be left temporarily | Synonyms: coatroom |
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| (noun) a private lounge off of a legislative chamber | - |
| cloveroot | (noun) hairy Eurasian plant with small yellow flowers and an astringent root formerly used medicinally | Synonyms: clover-root, Geum urbanum, herb bennet, wood avens |
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| clubroom | (noun) a room used for the activities of a club | - |
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| coatroom | (noun) a room where coats and other articles can be left temporarily | Synonyms: cloakroom |
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| colicroot | (noun) any of several perennials of the genus Aletris having grasslike leaves and bitter roots reputed to cure colic | Synonyms: colic root, crow corn, star grass, unicorn root |
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| coralroot | (noun) European bittercress having a knotted white rootstock | Synonyms: Cardamine bulbifera, coral-root bittercress, coralwort, Dentaria bulbifera |
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| costusroot | (noun) annual herb of the eastern Himalayas (Kashmir) having purple florets and a fragrant root that yields a volatile oil used in perfumery and for preserving furs | Synonyms: Saussurea costus, Saussurea lappa |
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| courtroom | (noun) a room in which a law court sits | Synonyms: court |
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| creaseproof | (adjective) of fabric that does not wrinkle easily | Synonyms: crease-resistant, wrinkle-resistant, wrinkleproof |
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| crinkleroot | (noun) North American herb with pungent scaly or toothed roots | Synonyms: Cardamine diphylla, crinkle-root, crinkle root, Dentaria diphylla, pepper root, toothwort |
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| crook | (noun) a long staff with one end being hook shaped | Synonyms: shepherd's crook |
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| (noun) someone who has committed a crime or has been legally convicted of a crime | Synonyms: criminal, felon, malefactor, outlaw |
| (noun) a circular segment of a curve | Synonyms: bend, turn, twist |
| (verb) bend or cause to bend | Synonyms: curve |
| crookback | (adjective) characteristic of or suffering from kyphosis, an abnormality of the vertebral column | Synonyms: crookbacked, gibbous, humpbacked, humped, hunchbacked, kyphotic |
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| (noun) a person whose back is hunched because of abnormal curvature of the upper spine | Synonyms: humpback, hunchback |
| crookbacked | (adjective) characteristic of or suffering from kyphosis, an abnormality of the vertebral column | Synonyms: crookback, gibbous, humpbacked, humped, hunchbacked, kyphotic |
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| crooked | (adjective) having or marked by bends or angles; not straight or aligned | - |
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| (adjective) not straight; dishonest or immoral or evasive | Synonyms: corrupt |
| (adjective) irregular in shape or outline | Synonyms: asymmetrical |
| (adjective) having the back and shoulders rounded; not erect | Synonyms: hunched, round-backed, round-shouldered, stooped, stooping |
| crookedly | (adverb) in a crooked lopsided manner | Synonyms: lopsidedly |
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| crookedness | (noun) having or distinguished by crooks or curves or bends or angles | - |
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| (noun) the quality of being deceitful and underhanded | Synonyms: deviousness |
| (noun) a tortuous and twisted shape or position | Synonyms: contortion, torsion, tortuosity, tortuousness |
| crookneck | (noun) yellow squash with a thin curved neck and somewhat warty skin | Synonyms: crookneck squash, summer crookneck |
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| croon | (verb) sing softly | - |
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| crooner | (noun) a singer of popular ballads | Synonyms: balladeer |
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| crooning | (noun) the act of singing popular songs in a sentimental manner | - |
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| (noun) singing in a soft low tone | - |
| darkroom | (noun) a room in which photographs are developed | - |
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| disproof | (noun) the act of determining that something is false | Synonyms: falsification, falsifying, refutal, refutation |
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| (noun) any evidence that helps to establish the falsity of something | Synonyms: falsification, refutation |
| drool | (noun) saliva spilling from the mouth | Synonyms: dribble, drivel, slobber |
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| (noun) pretentious or silly talk or writing | Synonyms: baloney, bilgewater, boloney, bosh, humbug, taradiddle, tarradiddle, tommyrot, tosh, twaddle |
| (verb) let saliva drivel from the mouth | Synonyms: dribble, drivel, slabber, slaver, slobber |
| (verb) be envious, desirous, eager for, or extremely happy about something | Synonyms: salivate |
| drooler | (noun) a person who dribbles | Synonyms: dribbler, driveller, slobberer |
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| droop | (noun) a shape that sags | Synonyms: sag |
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| (verb) become limp | Synonyms: wilt |
| (verb) droop, sink, or settle from or as if from pressure or loss of tautness | Synonyms: flag, sag, swag |
| (verb) hang loosely or laxly | Synonyms: loll |
| drooping | (adjective) hanging down (as from exhaustion or weakness) | Synonyms: droopy, sagging |
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| (adjective) weak from exhaustion | Synonyms: flagging |
| (adjective) having branches or flower heads that bend downward | Synonyms: cernuous, nodding, pendulous, weeping |
| droopingly | (adverb) in a drooping manner | - |
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| droopy | (adjective) hanging down (as from exhaustion or weakness) | Synonyms: drooping, sagging |
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| feverroot | (noun) coarse weedy American perennial herb with large usually perfoliate leaves and purple or dull red flowers | Synonyms: horse gentian, tinker's root, Triostium perfoliatum, wild coffee |
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| fingerroot | (noun) tall leafy European biennial or perennial having spectacular clusters of large tubular pink-purple flowers; leaves yield drug digitalis and are poisonous to livestock | Synonyms: common foxglove, Digitalis purpurea, fairy bell, finger-flower, finger-root, fingerflower |
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| fireproof | (adjective) impervious to damage by fire | - |
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| (verb) make resistant to fire | - |
| fireroom | (noun) (nautical) chamber or compartment in which the furnaces of a ship are stoked or fired | Synonyms: stokehold, stokehole |
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| flagroot | (noun) perennial marsh plant having swordlike leaves and aromatic roots | Synonyms: Acorus calamus, calamus, myrtle flag, sweet calamus, sweet flag |
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| flameproof | (adjective) resistant to catching fire | Synonyms: flame-retardant |
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| foolproof | (adjective) not liable to failure | Synonyms: unfailing |
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| (verb) proof against human misuse or error | Synonyms: goof-proof, goofproof |
| fumeroot | (noun) delicate European herb with greyish leaves and spikes of purplish flowers; formerly used medicinally | Synonyms: Fumaria officinalis, fumewort, fumitory |
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| (noun) herb of northern Europe and Asia having erect racemes of red flowers | Synonyms: Corydalis solida, fumewort |
| gingerroot | (noun) pungent rhizome of the common ginger plant; used fresh as a seasoning especially in Asian cookery | Synonyms: ginger |
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| goofproof | (verb) proof against human misuse or error | Synonyms: foolproof, goof-proof |
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| grassroots | (adjective) fundamental | - |
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| (adjective) of or involving the common people as constituting a fundamental political and economic group | - |
| greaseproof | (adjective) resistant to penetration by grease or oil or wax | - |
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| greenroom | (noun) a backstage room in a theater where performers rest or have visitors | - |
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| grillroom | (noun) a restaurant where food is cooked on a grill | Synonyms: grill |
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| groom | (noun) a man who has recently been married | Synonyms: bridegroom |
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| (noun) someone employed in a stable to take care of the horses | Synonyms: hostler, ostler, stableboy, stableman |
| (noun) a man participant in his own marriage ceremony | Synonyms: bridegroom |
| (verb) care for one's external appearance | Synonyms: neaten |
| (verb) give a neat appearance to | Synonyms: curry, dress |
| (verb) educate for a future role or function | Synonyms: prepare, train |
| groomed | (adjective) neat and smart in appearance; well cared for | - |
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| grooming | (noun) the activity of getting dressed; putting on clothes | Synonyms: dressing |
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| (noun) activity leading to skilled behavior | Synonyms: preparation, training |
| groomsman | (noun) a male attendant of the bridegroom at a wedding | - |
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| groove | (noun) a settled and monotonous routine that is hard to escape | Synonyms: rut |
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| (noun) (anatomy) any furrow or channel on a bodily structure or part | Synonyms: vallecula |
| (noun) a long narrow furrow cut either by a natural process (such as erosion) or by a tool (as e.g. a groove in a phonograph record) | Synonyms: channel |
| (verb) hollow out in the form of a furrow or groove | Synonyms: furrow, rut |
| (verb) make a groove in, or provide with a groove | - |
| grooved | (adjective) established as if settled into a groove or rut | Synonyms: well-grooved |
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| groover | (noun) a device that makes grooves by cutting or punching | - |
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| grooving | (noun) the cutting of spiral grooves on the inside of the barrel of a firearm | Synonyms: rifling |
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| groovy | (adjective) (British informal) very chic | Synonyms: swagger |
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| (adjective) excellent | Synonyms: bang-up, bully, corking, cracking, dandy, great, keen, neat, nifty, not bad, old, peachy, slap-up, smashing, swell |
| guardroom | (noun) a room used by soldiers on guard | - |
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| (noun) a cell in which soldiers who are prisoners are confined | - |
| guestroom | (noun) a bedroom that is kept for the use of guests | - |
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| headroom | (noun) the capacity of a system to reproduce loud sounds without distortion | Synonyms: dynamic headroom |
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| (noun) vertical space available to allow easy passage under something | Synonyms: clearance, headway |
| henroost | (noun) a roost for hens at night | - |
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| homeroom | (noun) a classroom in which all students in a particular grade (or in a division of a grade) meet at certain times under the supervision of a teacher who takes attendance and does other administrative business | Synonyms: home room |
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| houseroom | (noun) space for accommodation in a house | - |
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| kangaroo | (noun) any of several herbivorous leaping marsupials of Australia and New Guinea having large powerful hind legs and a long thick tail | - |
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