Q: Can you use "plethora" to mean "a lot," as in, I own a plethora of baseball hats?
A: The misuse of "plethora" is a pet peeve of mine. The word "plethora" doesn't mean "a lot," it means "too many or an overabundance." In the example, Many voters feel that there are a plethora of laws that are useless, it shows that some voters believe there are too many useless laws. And, if you say you own a plethora of baseball hats, you’re not saying you have a lot—you’re saying you believe you have too many for your own good and it's time to get rid of a few.