Peremptory is a formal word used especially in legal contexts to describe an order, command, etc., that requires immediate compliance with no opportunity to show why one should not comply. It is also used disapprovingly to describe someone with an arrogant attitude, or something indicative of such an attitude.

// The soldiers were given a peremptory order to abandon the mission.

// The company’s president tends to adopt a peremptory manner especially at the negotiating table.

If someone cannot abide someone or something bad, unpleasant, etc., they cannot tolerate or accept that person or thing. Abide can also mean "to accept without objection" and "to remain or continue."

// I just can't abide such blatant dishonesty.

// Residents agree to abide by the dorm's rules.

A bromide is a statement intended to make someone feel happier or calmer, but too dull and unoriginal to be effective.

// Their speech had nothing more to offer than the usual bromides about how everyone needs to work together.

Vamoose is an informal word that means "to depart quickly."

// With the sheriff hot on their tails, the bank robbers knew they had better vamoose.

Something described as conciliatory is intended to reduce hostility or to gain favor or goodwill.

// As the customer’s voice rose, the manager adopted a soothing, conciliatory tone and promised that the situation would be remedied.

A lout is an awkward brutish person.

// It was difficult for us to focus on the movie due to the noise coming from the group of louts seated in front of us.

Spontaneous describes something that is done or said in a natural and often sudden way and without a lot of thought or planning. It can describe a person who does things that have not been planned but that seem enjoyable and worth doing at a particular time.

// The kitten captured our hearts, and we made the spontaneous decision to adopt.

// He's a fun and spontaneous guy, always ready for the next big adventure.

Fidelity is the quality or state of being faithful to a person, such as a partner or spouse, or a thing, such as one’s country. Fidelity can also refer to accuracy or exactness in details, or the degree to which an electronic device (such as a television) accurately reproduces its effect (such as sound or picture).

// After almost three decades on the job, no one can doubt their fidelity to the company.

// The movie’s director insisted on total fidelity to the book

To ostracize someone is to exclude them from a group by the agreement of the group's members.

// She was ostracized by her community after refusing to sign the petition.

A hobgoblin is a mischievous goblin that plays tricks in children’s stories. When used figuratively, hobgoblin refers to something that causes fear or worry.

// This Halloween we were greeted at our door by werewolves, mummies, and a wide assortment of sweet-toothed hobgoblins.