What is the difference between singular nouns and singular verbs?

When something is singular, it's one. When the subject of a sentence is one thing or one person, the verb must match, so we say the verb is singular.

the only difference between these is that singular means one.

a verb is an action whereas a noun is a thing or a person.

hope this helps.

o h y e a h y e a

the simple predicate of the sentence is camped.