Then or than?

Then is an adverb that indicates time. It is used to place events in a sequence.
Than is a conjunction used to make comparisons. Than has no synonyms in English, making it a one-of-a-kind word.
I went to the store and then baked a cake.

I went to dinner, then the movies.
A cheetah can run faster than a human.

I’d rather work at a bank than as a lifeguard.