Bill vs Tom

Bill

• A diminutive of the male given name William. 

• A nickname for the British constabulary. Often called "The Bill" or "Old Bill" 

• A surname. 

Tom

• A diminutive of the male given name Thomas, also used as a formal male given name. 

• A nickname for a common man. 

• A large, deep-toned bell, or a particularly notable example of one. 

• Synonym of menstruation.