Are there any substitutes for honey when trying to activate yeast?
Yes you can use 3/4 cup (180 ml) of light/dark corn syrup:

You can use any of the following substitutions: 


1 cup of honey
3/4 cup (180 ml) maple syrup plus 1/2 cup (100 grams) granulated white sugar
3/4 cup (180 ml) light or dark corn syrup plus 1/2 cup (100 grams) granulated white sugar
3/4 cup (180 ml) light molasses plus 1/2 cup (100 grams) granulated white sugar
1 1/4 cups (250 grams - 265 grams) granulated white or brown sugar plus 1/4 cup (60 ml) additional liquid in recipe plus 1/2 teaspoon cream of tartar


Courtesy of Joy Of Baking