I'll do my best to use the words in easy sentences. I am assuming that you know what the words mean. Hopefully these help.
"I hate it when people are so condescending."
The only time I have ever heard condescend used by itself (without -ing) is in the infinitive (to condescend) when someone is defining the word. It is usually always written as "condescending" The word usually describes someone's behavior, attitude, or choice of words. ("He is very condescending." "She has a very condescending tone of voice." "They treat everyone like they are children. I think they are very condescending.")
"Your paycheck should be commensurate with the amount of time you worked." This is not a word that is commonly used outside of the formal and professional world. Someone else might give a better sentence.
This one's tricky because it has so many meanings.
"He had the countenance of a pirate."
He looks like a pirate!
"She continued to countenance his bad behavior."
She tolerated his bad behavior.
"They were out of countenance (idiom) when they learned about the horrible accident."
They looked distressed when they learned about the accident.
"I will not jeopardize the success of this mission by giving away our position!"
"They jeopardized the entire deal because of their rude remarks."
"His grade was in jeopardy when his teacher suspected him of plagiarism."