As in earth and hour or each separately?
- tower
- flower
- flour
- sour
- cower
- power
Some words that rhyme with "earth" are birth, mirth, girth, and worth.
fouler, hour
"Mass" rhymes with grass and is related to the Earth as it represents the amount of matter in an object.
birth
Tiles her shower.
birth
birth
Apparently it's "Houndour".
Earth Hour was created in 2007.
eighty-eight
town
I will give him an hour.