There are a number of categories of what could be called TRICKY WORDS. One such category is a collection of words known as homophones. These words are pairs or triads of words which sound the same when spoken although they are spelled differently. Here are several examples:

pair / pear bear / bare write / right too / two / to toad / toed / towed ware / wear / where days / daze wood / would hall / haul hair / hare tide / tied

fir / fur band / banned ate / eight tale / tail waist / waste weight / wait their / there / they're which / witch him / hymn peace / piece brake / break