Noun:
* "The chef added a generous sprinkle of pepper to the pasta sauce." (Here, "pepper" is the spice itself.)
* "I bought a whole bag of black pepper at the grocery store." (Again, "pepper" refers to the spice.)
Verb:
* "She peppered her speech with humorous anecdotes." (Here, "peppered" means to sprinkle or add something frequently.)
* "The protesters peppered the police with questions." (This means they bombarded them with a lot of questions, not necessarily literally throwing pepper.)
Both:
* "He peppered the salad with freshly ground pepper." (Here, "pepper" is used as both a noun and a verb in the same sentence.)