Core Spelling Words of the Week peace (pēs) n. The absence of war or other hostilities. An agreement or a treaty to end hostilities. Freedom from quarrels and disagreement; harmonious relations: roommates living in peace with each other. lead·er (lē'dər) n. One that leads or guides. One who is in charge or in command of others. One who heads a political party or organization. One who has influence or power, especially of a political nature. e·vent (ĭ-vĕnt') n. Something that takes place; an occurrence. A significant occurrence or happening. See synonyms at occurrence. A social gathering or activity. The final result; the outcome. dan·ger·ous (dān'jər-əs) adj. Involving or filled with danger; perilous. Being able or likely to do harm. plan·et (plăn'ĭt) n. In the traditional model of solar systems, a celestial body larger than an asteroid or comet, illuminated by light from a star, such as the sun, around which it revolves. A celestial body that orbits the sun, has sufficient mass to assume nearly a round shape, clears out dust and debris from the neighborhood around its orbit, and is not a satellite of another planet.