~我發現英文有好多同音字~

你講緊的係叫做 homonym.

In linguistics, a homonym is one of a group of words that share the same spelling or pronunciation (or both) but have different meanings.
The word "homonym" comes from the conjunction of the Greek prefix homo- (meaning same) and suffix -onym (meaning name). Thus, it refers to two or more distinct words sharing the "same name".

以下的超連結有好多例子：
http://www.cooper.com/alan/homonym_list.html

可看看:
http://www.ipa.edu.hk/english_homophones.php

way/weigh
key/que
mop/map
sum/some


希望可以幫到你!!