Similar meaning words used for any specific word are called Synonym. In Other words, A word that means nearly same as another word in the same language are called Synonyms.
Example : [ Beautiful ] - Lovely, Attractive, Pretty, Gorgeous, Dazzling.
Know about synonym in english. Also Watch list of English synonyms with many examples.
What is Synonym (Paryayvachi, Samanarthi Shabd) in English? (Synonym ki definition Kya Hai?).