| sectional | (noun) a piece of furniture made up of sections that can be arranged individually or together | - |
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| semicentennial | (noun) the 50th anniversary (or the celebration of it) | Synonyms: semicentenary |
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| semifinal | (noun) one of the two competitions in the next to the last round of an elimination tournament | Synonyms: semi |
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| semiprofessional | (noun) an athlete who plays for pay on a part-time basis | Synonyms: semipro |
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| seneschal | (noun) the chief steward or butler of a great household | Synonyms: major-domo |
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| sepal | (noun) one of the green parts that form the calyx of a flower | - |
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| serial | (noun) a serialized set of programs | Synonyms: series |
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| (noun) a periodical that appears at scheduled times | Synonyms: serial publication, series |
| serval | (noun) slender long-legged African wildcat having large untufted ears and tawny black-spotted coat | Synonyms: Felis serval |
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| sesquicentennial | (noun) the 150th anniversary (or the celebration of it) | - |
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| shoal | (noun) a large group of fish | Synonyms: school |
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| (noun) a stretch of shallow water | Synonyms: shallow |
| (noun) a sandbank in a stretch of water that is visible at low tide | - |
| sial | (noun) the granitelike rocks that form the outermost layer of the earth's crust; rich in silicon and aluminum | - |
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| signal | (noun) any nonverbal action or gesture that encodes a message | Synonyms: sign, signaling, signalling |
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| (noun) any incitement to action | - |
| (noun) an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes | - |
| simal | (noun) East Indian silk cotton tree yielding fibers inferior to kapok | Synonyms: Bombax ceiba, Bombax malabarica, red silk-cotton tree |
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| sisal | (noun) Mexican or West Indian plant with large fleshy leaves yielding a stiff fiber used in e.g. rope | Synonyms: Agave sisalana |
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| (noun) a plant fiber used for making rope | Synonyms: sisal hemp |
| social | (noun) a party of people assembled to promote sociability and communal activity | Synonyms: mixer, sociable |
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| special | (noun) a special offering (usually temporary and at a reduced price) that is featured in advertising | - |
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| (noun) a television production that features a particular person or work or topic | - |
| (noun) a dish or meal given prominence in e.g. a restaurant | - |
| spinal | (noun) anesthesia of the lower half of the body; caused by injury to the spinal cord or by injecting an anesthetic beneath the arachnoid membrane that surrounds the spinal cord | Synonyms: spinal anaesthesia, spinal anesthesia |
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| spiral | (noun) flying downward in a helical path with a large radius | - |
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| (noun) a structure consisting of something wound in a continuous series of loops | Synonyms: coil, helix, volute, whorl |
| (noun) ornament consisting of a curve on a plane that winds around a center with an increasing distance from the center | Synonyms: volute |
| (noun) a continuously accelerating change in the economy | - |
| (noun) a plane curve traced by a point circling about the center but at increasing distances from the center | - |
| (noun) a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle | Synonyms: helix |
| spiritual | (noun) a kind of religious song originated by Blacks in the southern United States | Synonyms: Negro spiritual |
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| squeal | (noun) a high-pitched howl | - |
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| steal | (noun) a stolen base; an instance in which a base runner advances safely during the delivery of a pitch (without the help of a hit or walk or passed ball or wild pitch) | - |
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| (noun) an advantageous purchase | Synonyms: bargain, buy |
| subnormal | (noun) a person of less than normal intelligence | - |
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| subtotal | (noun) the sum of part of a group of numbers | - |
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| sundial | (noun) timepiece that indicates the daylight hours by the shadow that the gnomon casts on a calibrated dial | - |
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| supernatural | (noun) supernatural forces and events and beings collectively | Synonyms: occult |
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| supposal | (noun) a hypothesis that is taken for granted | Synonyms: assumption, supposition |
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| (noun) the cognitive process of supposing | Synonyms: supposition |
| surmisal | (noun) a message expressing an opinion based on incomplete evidence | Synonyms: conjecture, guess, hypothesis, speculation, supposition, surmise |
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| surprisal | (noun) the act of surprising someone | Synonyms: surprise |
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| surrebuttal | (noun) (law) a pleading by the plaintiff in reply to the defendant's rebutter | Synonyms: surrebutter |
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| survival | (noun) something that survives | - |
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| (noun) a natural process resulting in the evolution of organisms best adapted to the environment | Synonyms: natural selection, selection, survival of the fittest |
| (noun) a state of surviving; remaining alive | Synonyms: endurance |
| tamal | (noun) dough stuffed with a meat mixture and sometimes wrapped in corn husks and steamed | Synonyms: tamale |
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| tarsal | (noun) any bone of the tarsus | Synonyms: tarsal bone |
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| teal | (noun) any of various small short-necked dabbling river ducks of Europe and America | - |
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| (noun) a blue-green color or pigment | Synonyms: blue green, bluish green |
| technical | (noun) (basketball) a foul that can be assessed on a player or a coach or a team for unsportsmanlike conduct; does not usually involve physical contact during play | Synonyms: technical foul |
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| (noun) a pickup truck with a gun mounted on it | - |
| temporal | (noun) the semantic role of the noun phrase that designates the time of the state or action denoted by the verb | Synonyms: temporal role |
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| tepal | (noun) an undifferentiated part of a perianth that cannot be distinguished as a sepal or a petal (as in lilies and tulips) | - |
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| tercentennial | (noun) the 300th anniversary (or the celebration of it) | Synonyms: tercentenary, triennial |
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| terminal | (noun) station where transport vehicles load or unload passengers or goods | Synonyms: depot, terminus |
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| (noun) a contact on an electrical device (such as a battery) at which electric current enters or leaves | Synonyms: pole |
| (noun) electronic equipment consisting of a device providing access to a computer; has a keyboard and display | - |
| (noun) either extremity of something that has length | Synonyms: end |
| territorial | (noun) a territorial military unit | Synonyms: territorial reserve |
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| (noun) nonprofessional soldier member of a territorial military unit | - |
| testimonial | (noun) something that recommends (or expresses commendation of) a person or thing as worthy or desirable | Synonyms: good word, recommendation |
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| (noun) something given or done as an expression of esteem | Synonyms: tribute |
| (noun) something that serves as evidence | Synonyms: testimony |
| theatrical | (noun) a performance of a play | Synonyms: histrionics, representation, theatrical performance |
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| thermal | (noun) rising current of warm air | - |
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| thimerosal | (noun) a light-colored crystalline powder (trade name Merthiolate) used as a surgical antiseptic | Synonyms: Merthiolate, sodium ethylmercurithiosalicylate |
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| thiopental | (noun) barbiturate that is a hygroscopic powder (trade name Pentothal) that is a strong barbiturate that acts rapidly; induces a relaxed state when injected as a general anesthetic | Synonyms: Pentothal, thiopental sodium, thiopentobarbital sodium |
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| tical | (noun) the basic unit of money in Thailand | Synonyms: baht |
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| total | (noun) the whole amount | Synonyms: aggregate, sum, totality |
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| (noun) a quantity obtained by the addition of a group of numbers | Synonyms: amount, sum |
| transexual | (noun) a person whose sexual identification is entirely with the opposite sex | Synonyms: transsexual |
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| (noun) a person who has undergone a sex change operation | Synonyms: transgendered, transsexual |
| transferral | (noun) the act of moving something from one location to another | Synonyms: conveyance, transfer, transport, transportation |
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| transmittal | (noun) the act of sending a message; causing a message to be transmitted | Synonyms: transmission, transmitting |
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| transsexual | (noun) a person whose sexual identification is entirely with the opposite sex | Synonyms: transexual |
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| (noun) a person who has undergone a sex change operation | Synonyms: transexual, transgendered |
| traversal | (noun) taking a zigzag path on skis | Synonyms: traverse |
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| (noun) travel across | Synonyms: traverse |
| trial | (noun) the act of testing something | Synonyms: run, test |
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| (noun) (law) the determination of a person's innocence or guilt by due process of law | - |
| (noun) the act of undergoing testing | Synonyms: test |
| (noun) trying something to find out about it | Synonyms: test, trial run, tryout |
| (noun) an annoying or frustrating or catastrophic event | Synonyms: tribulation, visitation |
| (noun) (sports) a preliminary competition to determine qualifications | - |
| tribunal | (noun) an assembly (including one or more judges) to conduct judicial business | Synonyms: court, judicature |
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| triennial | (noun) the 300th anniversary (or the celebration of it) | Synonyms: tercentenary, tercentennial |
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| trigeminal | (noun) the main sensory nerve of the face and motor nerve for the muscles of mastication | Synonyms: fifth cranial nerve, nervus trigeminus, trigeminal nerve, trigeminus |
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| trilateral | (noun) a three-sided polygon | Synonyms: triangle, trigon |
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| triquetral | (noun) a wrist bone that articulates with the pisiform and hamate and lunate bones | Synonyms: cuneiform bone, os triquetrum, pyramidal bone, triquetral bone |
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| turbinal | (noun) any of the scrolled spongy bones of the nasal passages in man and other vertebrates | Synonyms: turbinate, turbinate bone |
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| tutorial | (noun) a session of intensive tuition given by a tutor to an individual or to a small number of students | - |
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| umbilical | (noun) membranous duct connecting the fetus with the placenta | Synonyms: umbilical cord |
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| uncial | (noun) a style of orthography characterized by somewhat rounded capital letters; found especially in Greek and Latin manuscripts of the 4th to 8th centuries | - |
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| underseal | (noun) seal consisting of a coating of a tar or rubberlike material on the underside of a motor vehicle to retard corrosion | Synonyms: undercoat |
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| universal | (noun) coupling that connects two rotating shafts allowing freedom of movement in all directions | Synonyms: universal joint |
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| (noun) a behavioral convention or pattern characteristic of all members of a particular culture or of all human beings | - |
| (noun) (logic) a proposition that asserts something of all members of a class | Synonyms: universal proposition |
| (noun) (linguistics) a grammatical rule (or other linguistic feature) that is found in all languages | Synonyms: linguistic universal |
| upheaval | (noun) disturbance usually in protest | Synonyms: agitation, excitement, hullabaloo, turmoil |
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| (noun) (geology) a rise of land to a higher elevation (as in the process of mountain building) | Synonyms: uplift, upthrow, upthrust |
| (noun) a state of violent disturbance and disorder (as in politics or social conditions generally) | Synonyms: Sturm und Drang, turbulence |
| (noun) a violent disturbance | Synonyms: convulsion, turmoil |
| urial | (noun) bearded reddish sheep of southern Asia | Synonyms: Ovis vignei |
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| urinal | (noun) a plumbing fixture (usually attached to the wall) used by men to urinate | - |
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| vandal | (noun) someone who willfully destroys or defaces property | - |
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| varietal | (noun) a wine made principally from one grape and carrying the name of that grape | Synonyms: varietal wine |
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| vassal | (noun) a person holding a fief; a person who owes allegiance and service to a feudal lord | Synonyms: feudatory, liege, liege subject, liegeman |
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| veal | (noun) meat from a calf | Synonyms: veau |
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| veronal | (noun) a barbiturate used as a hypnotic | Synonyms: barbital, barbitone, diethylbarbituric acid, diethylmalonylurea |
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| vertical | (noun) a vertical structural member as a post or stake | Synonyms: upright |
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| (noun) something that is oriented vertically | - |
| vestal | (noun) a chaste woman | - |
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| vial | (noun) a small bottle that contains a drug (especially a sealed sterile container for injection by needle) | Synonyms: ampoule, ampul, ampule, phial |
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| victual | (noun) any substance that can be used as food | Synonyms: comestible, eatable, edible, pabulum, victuals |
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| virginal | (noun) a legless rectangular harpsichord; played (usually by women) in the 16th and 17th centuries | Synonyms: pair of virginals |
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| vocal | (noun) music intended to be performed by one or more singers, usually with instrumental accompaniment | Synonyms: vocal music |
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| (noun) a short musical composition with words | Synonyms: song |
| warragal | (noun) wolflike yellowish-brown wild dog of Australia | Synonyms: Canis dingo, dingo, warrigal |
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| (noun) Australian wild horse | Synonyms: warrigal |
| warrigal | (noun) wolflike yellowish-brown wild dog of Australia | Synonyms: Canis dingo, dingo, warragal |
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| (noun) Australian wild horse | Synonyms: warragal |
| watermeal | (noun) any of various aquatic plants of the genus Wolffia; throughout warmer regions of the world | - |
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| weal | (noun) a raised mark on the skin (as produced by the blow of a whip); characteristic of many allergic reactions | Synonyms: wale, welt, wheal |
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| wheal | (noun) a raised mark on the skin (as produced by the blow of a whip); characteristic of many allergic reactions | Synonyms: wale, weal, welt |
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| wherewithal | (noun) the necessary means (especially financial means) | - |
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| whoriental | (noun) An East Asian Whore | - |
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| withdrawal | (noun) the act of withdrawing | - |
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| (noun) formal separation from an alliance or federation | Synonyms: secession |
| (noun) the termination of drug taking | Synonyms: drug withdrawal |
| (noun) the act of taking out money or other capital | - |
| (noun) a method of birth control in which coitus is initiated but the penis is deliberately withdrawn before ejaculation | Synonyms: coitus interruptus, onanism, pulling out, withdrawal method |
| (noun) the act of withdrawing blood, tumors, etc. | - |
| (noun) the act of ceasing to participate in an activity | - |
| (noun) a retraction of a previously held position | Synonyms: backdown, climb-down |
| (noun) avoiding emotional involvement | Synonyms: detachment |
| zeal | (noun) prompt willingness | Synonyms: eagerness, forwardness, readiness |
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| (noun) a feeling of strong eagerness (usually in favor of a person or cause) | Synonyms: ardor, ardour, elan |
| (noun) excessive fervor to do something or accomplish some end | - |