What part of speech is the word cents?

"Cents" can be either a noun or an adjective, depending on how it's used in a sentence.

Here are some examples:

Noun:

* I have 50 cents in my pocket. (Here, "cents" refers to the currency.)

Adjective:

* That's a cents-off coupon. (Here, "cents" modifies the noun "coupon" and means "relating to cents").

Let me know if you'd like more examples!