In your first example, "s" makes the verb third person singular. In your second example. "s" makes the noun plural.
Student or Learner
What makes a word different, besides plural, when an "s" is added? For example, what's the difference from smile and smiles. Eg. He smiles beautifully. Her smile is fake.
You need to differentiate between a noun and a verb. A plural noun takes an "s" on the end. The third person singular present simple form of a verb takes an "s" on the end.
Remember - if you don't use correct capitalisation, punctuation and spacing, anything you write will be incorrect.