| berkelium | (noun) a radioactive transuranic element; discovered by bombarding americium with helium | Synonyms: atomic number 97, Bk |
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| cupronickel | (noun) a 60/40 alloy of copper and nickel | - |
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| cytoskeleton | (noun) a microscopic network of actin filaments and microtubules in the cytoplasm of many living cells that gives the cell shape and coherence | - |
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| endoskeleton | (noun) the internal skeleton; bony and cartilaginous structure (especially of vertebrates) | - |
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| exoskeleton | (noun) the exterior protective or supporting structure or shell of many animals (especially invertebrates) including bony or horny parts such as nails or scales or hoofs | - |
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| heckelphone | (noun) an oboe pitched an octave below the ordinary oboe | Synonyms: basset oboe |
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| keloid | (noun) raised pinkish scar tissue at the site of an injury; results from excessive tissue repair | Synonyms: cheloid |
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| kelp | (noun) large brown seaweeds having fluted leathery fronds | - |
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| kelpie | (noun) an Australian sheepdog with pointed ears | - |
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| (noun) (Scottish folklore) water spirit in the form of a horse that likes to drown its riders | Synonyms: kelpy |
| kelpwort | (noun) bushy plant of Old World salt marshes and sea beaches having prickly leaves; burned to produce a crude soda ash | Synonyms: barilla, glasswort, kali, Salsola kali, Salsola soda, saltwort |
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| kelpy | (noun) (Scottish folklore) water spirit in the form of a horse that likes to drown its riders | Synonyms: kelpie |
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| kelter | (noun) in working order | Synonyms: kilter |
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| kelvin | (noun) the basic unit of thermodynamic temperature adopted under the Systeme International d'Unites | Synonyms: K |
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| likelihood | (noun) the probability of a specified outcome | Synonyms: likeliness |
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| likeliness | (noun) the probability of a specified outcome | Synonyms: likelihood |
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| mispickel | (noun) a silver-white or grey ore of arsenic | Synonyms: arsenopyrite |
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| muskellunge | (noun) large (60 to 80 pounds) sport fish of North America | Synonyms: Esox masquinongy |
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| (noun) flesh of very large North American pike; a game fish | - |
| nickel | (noun) a United States coin worth one twentieth of a dollar | - |
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| (noun) five dollars worth of a drug | Synonyms: nickel note |
| (noun) a hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite | Synonyms: atomic number 28, Ni |
| nickelodeon | (noun) a cabinet containing an automatic record player; records are played by inserting a coin | Synonyms: jukebox |
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| pickelhaube | (noun) a spiked helmet worn by German soldiers | - |
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| pumpernickel | (noun) bread made of coarse rye flour | Synonyms: black bread |
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| rathskeller | (noun) a tavern below street level featuring beer; originally a German restaurant in the basement of city hall | - |
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| schnorkel | (noun) air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time | Synonyms: breather, schnorchel, snorkel, snorkel breather |
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| seckel | (noun) small yellowish- to reddish-brown pear | Synonyms: seckel pear |
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| shekel | (noun) the basic unit of money in Israel | - |
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| shekels | (noun) informal terms for money | Synonyms: boodle, bread, cabbage, clams, dinero, dough, gelt, kale, lettuce, lolly, loot, lucre, moolah, pelf, scratch, simoleons, sugar, wampum |
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| skeleton | (noun) the internal supporting structure that gives an artifact its shape | Synonyms: frame, skeletal frame, underframe |
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| (noun) the hard structure (bones and cartilages) that provides a frame for the body of an animal | Synonyms: frame, skeletal system, systema skeletale |
| (noun) a scandal that is kept secret | Synonyms: skeleton in the closet, skeleton in the cupboard |
| (noun) something reduced to its minimal form | - |
| snorkel | (noun) air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time | Synonyms: breather, schnorchel, schnorkel, snorkel breather |
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| (noun) breathing device consisting of a bent tube fitting into a swimmer's mouth and extending above the surface; allows swimmer to breathe while face down in the water | - |
| snorkeling | (noun) skin diving with a snorkel | Synonyms: snorkel diving |
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| spikelet | (noun) a small sharp-pointed tip resembling a spike on a stem or leaf | Synonyms: pricker, prickle, spine, sticker, thorn |
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| tchotchkeleh | (noun) (Yiddish) an attractive, unconventional woman | Synonyms: chachka, tchotchke, tsatske, tshatshke |
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| tetraskele | (noun) a figure consisting of four stylized human arms or legs (or bent lines) radiating from a center | Synonyms: tetraskelion |
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| tetraskelion | (noun) a figure consisting of four stylized human arms or legs (or bent lines) radiating from a center | Synonyms: tetraskele |
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| triskele | (noun) a figure consisting of three stylized human arms or legs (or three bent lines) radiating from a center | Synonyms: triskelion |
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| triskelion | (noun) a figure consisting of three stylized human arms or legs (or three bent lines) radiating from a center | Synonyms: triskele |
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| unlikelihood | (noun) the improbability of a specified outcome | Synonyms: unlikeliness |
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| unlikeliness | (noun) the improbability of a specified outcome | Synonyms: unlikelihood |
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| yokel | (noun) a person who is not very intelligent or interested in culture | Synonyms: bumpkin, chawbacon, hayseed, hick, rube, yahoo |
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