Definition: A word that means the same, or approximately the same, as another word. Two words can be considered synonyms even if they aren't interchangeable in all contexts.
Also Known As: Sinónino in Spanish.
Examples:
In Spanish, entender and comprender are synonyms (both usually mean "to understand"), as are marida and esposa (both mean "wife"). In English, "late" and "tardy" are synonymous, as are "perfect" and "flawless."

