A word puzzle

[Windsor]

What are two words, (one 5 letters ando one 4 letters) that sound similar but have opposite meanings? I've been searching for homonyms that are antonyms but I'm not having much luck.

Heh, whoops, forgot important part of puzzle...

[Markel]

One designation for such words is "Janus" words. These are words that have two meanings that are opposite. For example, "cleave" can mean to divide or to be joined to.

A google search on "janus words" will give you much info.