Is "soccer" a verb or an adjective?
The word soccer can be either a noun or an adjective.
It is a noun in sentence like: Cristiano Ronaldo plays soccer very well.
Here word soccer is a direct object; we can ask a question: What does Cristiano Ronaldo play?. Word soccer is an object, so it acts like a noun.
It can also be an adjective for example in:
There are two soccer clubs in our city.
Here word soccer describes word club therfore it acts as an adjective.