Thesaurus

(n) : a higher or stronger articulation of a particular syllable of a word or phrase in order to distinguish it from the others or to emphasize it; a mark or character used in writing, in order to indicate the place of the spoken accent, or to indicate the nature or quality of the vowel marked

(v) : to express the accent of (either by the voice or by a mark); to utter or to mark with accent; to mark emphatically; to emphasize; to accentuate