I gotten to the hotel two hours ago, but my flight was delayed.
should have
should
should of

should have

Explanation:

When testing out the words, "Should have" is the only one that sounds correct.

I should have gotten to the hotel two hours ago, but my flight was delayed.

voracity is the noun corresponding to the adjective voracious, which means (1) eager to consume a great amount of food, or (2) marked by an insatiable appetite. veracity is far more common than the rare voracity, so the latter is sometimes used in place of the former.