Singular Nouns:
* Boss
* Class
* Kiss
* Loss
* Mass (as in a large amount)
* Pass (as in a pass through a mountain)
* Press (as in a printing press)
* Stress
* Witness
Plural Nouns:
* Bosses
* Classes
* Kisses
* Losses
* Masses (as in a group of people)
* Passes
* Presses
* Stresses
* Witnesses
Other:
* Cross (as in a religious symbol)
* Grass
* Address
Let me know if you'd like more examples or have any other questions!