在学习英语词汇中，有时同义词的辨析是很不容易的，我们一般从三方面进行区分，即：语法、语义和文体。语法主要是词性、搭配、句式等的区分;语义主要是词义的本义、引申义、比喻义和内涵和外延等的区分;文体主要是正式和非正式、褒义和贬义等的区分。

　　3.战斗

　　fight: It is a bodily struggle

　　struggle: An effort of any kind to overcome difficulty.

　　battle: A fight between armed forces.

　　campaign: A series of related military operations in a war.

　　war: A period of fight between countries or states when

　　weapons are used and many people are killed.

　　combat: A fight, conflict, controversy.