Homographs are words that are spelled the same but have different meanings and sometimes different pronunciations.
While "rock" has multiple meanings, it's spelled and pronounced the same way in all of them:
* A solid piece of stone: "I tripped over a rock on the path."
* To move back and forth rhythmically: "The baby was rocking in the cradle."
* A type of music: "I love listening to classic rock."
Let me know if you'd like to explore other homographs!