Conjunctions: These connect two or more units of words, phrases, or clauses together.

Coordinating conjunctions: These connect two or more units of a language that are equal within a sentence. There are seven main coordinating conjunctions. These are: for, and, nor, but, or, yet, so

You are able to coordinate both verbs and nouns with "and" as well as "or".

"I'm swimming and chewing gum." (verbs)

"Do you have a pencil and paper?" (nouns)

Subordinating conjunctions: These connect two or more clauses and form complex sentences, which have at least one independent and one or more dependent ones.

"Upon completing my PhD in Psychology, I immigrated to China to start a new life."

The beginning is an independent statement, whereas the second one is dependent upon the first to make sense.