This set of -ug word spelling worksheets will help children practice words with the "ug" sound. These spelling worksheets contain the words bug, dug, hug, mug, rug, and plug. We have five different worksheets so you can do a different one each day of the week. Whether kids are trying to unscramble the word bug (with help from the picture) or trying to find the word dug in our word search, they are sure to have a good time learning with these spelling worksheets.