Controls :: Automatically Replace Word In TextBox With Word In Database On Button Click

I have text box and submit button in my page and I have 2 table 1- WORD table   2-name table in database

when I click on submit button it insert textbox.text in database in Name table

I define some word in my word table like:

Bad
Worst
badly and other words

Now I want if users enter word's that is in Word table when they click on submit button it replace that word with this word-->"GOOD"

How I can do it?