There are too many of these words, let me think of a few commonly used ones for you.
Seven strokes: Good (Fire)
Cheng (Gold)
Jun (Wood)
Yan (Earth)
Xi (water)
Nine strokes: Zhao (fire)
Yan (wood)
Star (gold)
Wei (earth)
Quan (water)
Fifteen strokes: Yi (wood)
Ting (water)
Wei (earth)
Rui (gold)
Li (fire)
The strokes are based on the Kangxi dictionary.