| antihero | (noun) a protagonist who lacks the characteristics that would make him a hero (or her a heroine) | - |
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| banderillero | (noun) the bullfighter who implants decorated darts (banderillas) into the neck or shoulders of the bull during a bull fight | - |
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| bolero | (noun) a Spanish dance in triple time accompanied by guitar and castanets | - |
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| (noun) a short jacket; worn mostly by women | - |
| (noun) music written in the rhythm of the bolero dance | - |
| bracero | (noun) a Mexican laborer who worked in the United States on farms and railroads in order to ease labor shortages during World War II | - |
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| cero | (noun) large edible mackerel of temperate United States coastal Atlantic waters | Synonyms: kingfish, pintado, Scomberomorus regalis |
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| (noun) large mackerel with long pointed snout; important food and game fish of the eastern Atlantic coast southward to Brazil | Synonyms: cavalla, king mackerel, Scomberomorus cavalla |
| cicero | (noun) a linear unit of the size of type slightly larger than an em | - |
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| curandero | (noun) a Mexican man who practices healing techniques inherited from the Mayans | - |
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| dinero | (noun) informal terms for money | Synonyms: boodle, bread, cabbage, clams, dough, gelt, kale, lettuce, lolly, loot, lucre, moolah, pelf, scratch, shekels, simoleons, sugar, wampum |
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| hero | (noun) the principal character in a play or movie or novel or poem | - |
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| (noun) a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States | Synonyms: bomber, Cuban sandwich, grinder, hero sandwich, hoagie, hoagy, Italian sandwich, poor boy, sub, submarine, submarine sandwich, torpedo, wedge, zep |
| (noun) a person distinguished by exceptional courage and nobility and strength | - |
| (noun) someone who fights for a cause | Synonyms: champion, fighter, paladin |
| (noun) (classical mythology) a being of great strength and courage celebrated for bold exploits; often the offspring of a mortal and a god | - |
| novillero | (noun) a bullfighter who is required to fight bulls less than four years of age | - |
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| sombrero | (noun) a straw hat with a tall crown and broad brim; worn in American southwest and in Mexico | - |
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| torero | (noun) a matador or one of the supporting team during a bull fight | - |
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| vaquero | (noun) local names for a cowboy (`vaquero' is used especially in southwestern and central Texas and `buckaroo' is used especially in California) | Synonyms: buckaroo, buckeroo |
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| zero | (adjective) of or relating to the null set (a set with no members) | - |
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| (adjective) indicating the absence of any or all units under consideration | Synonyms: 0 |
| (adjective) having no measurable or otherwise determinable value | - |
| (adjective) indicating an initial point or origin | - |
| (noun) the sight setting that will cause a projectile to hit the center of the target with no wind blowing | - |
| (noun) the point on a scale from which positive or negative numerical quantities can be measured | Synonyms: zero point |
| (noun) a mathematical element that when added to another number yields the same number | Synonyms: 0, cipher, cypher, nought |
| (noun) a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential | Synonyms: aught, cipher, cypher, goose egg, nada, naught, nil, nix, nothing, null, zilch, zip, zippo |
| (verb) adjust (as by firing under test conditions) the zero of (a gun) | Synonyms: zero in |
| (verb) adjust (an instrument or device) to zero value | - |