To answer your question accurately, I need to know the specific words you're referring to. Please provide the list of words, and I'll help you determine which one doesn't fit.
stop or halt is a four letter word meaning the opposite of go.
if I remember correctly, the root word for 4 is quad or quart...
A four letter word for 'don't go' is stay.
over
stop
Seek
dawn
swim?
to look or to seek
that would be "seek"
posthaste
The word "salt" can be rearranged to spell a few other words.These other four lettered words are:AltsLastLatsSlat