Common words:
* bell
* rebel
* swell
* dwell
* trell (archaic, meaning a trellis)
* spell
* knell
* shell
Less common words:
* shoebell (a type of flower)
* sheebell (an archaic word for a girl's name)
* quibble
* scribble
* snibble (to eat something in small bites)
Proper nouns:
* Campbell (a surname)
* Maxwell (a surname)
* Belle (a name)
Let me know if you'd like me to find some more!