Part A: Introduction

“Lexicology” (from Greek LEXIS “word” and LOGOS “learning”) is the study of vocabulary items (also called LEXEMES) of a language including their meanings and relations (synonym, antonym, semantic field etc…) and changes in their form and meaning through time. Synonym itself is a small unit of lexicology. Despite of the tiny position, it has its own strength in English. Synonym is very common in all means of communication from informal to formal communication. In deed, I have been meeting many synonymous words when I read papers or watch television or listen to the radio. And the more I meet them, the more I find from them, its effect to a discourse or a programs. And sometimes I discover the very interesting thing from the time synonym takes its effect. I sometimes try to use synonymous in my tests of English, especially in Translating and Writing subject, and even in speaking skill, and the result seemed to be higher than usual. Thus, I make myself get accustomed to using this kind in each skill in English and up to now, I get the certain success from using it. Therefore, I chose synonym for my assignment in order to partly provide the essential information about synonym to the students, because I myself regard it as a very useful tool for the learners of English