Someone who is unabashed is not embarrassed or ashamed about openly expressing strong feelings or opinions.

// Unabashed by their booing and hissing, the artist continued with the musical performance.

Perdition refers to hell, or to the state of being in hell forever as punishment after death—in other words, damnation. It is usually used figuratively.

// Dante’s Inferno details the main character’s journey through perdition.

// It’s this kind of selfishness that leads down the road to perdition.

Amalgamate is a formal verb meaning "to unite (two or more things) into one thing."

// The school district has proposed amalgamating the two high schools.

Metonymy refers to a figure of speech in which a word that is associated with something is used to refer to the thing itself, as when crown is used to mean “king” or “queen.”

// Wall Street, Silicon Valley, and Hollywood are common examples of metonymy.

To bloviate is to speak or write in an arrogant tone and with more words than are necessary.

// The podcaster tends to bloviate endlessly on topics about which he is not particularly knowledgeable.

Gauche describes someone or something having or showing a lack of awareness about the proper way to behave. When describing a person or a behavior, gauche can mean “socially awkward” or “tactless”; when describing an object (such as a product with a vulgar image or slogan on it) it can mean “crudely made or done.”

// Some people view giving cash in lieu of a wrapped present to be terribly gauche, but I like knowing that my friends and family will be able to pick out something they truly want.

Eccentric usually describes people and things that deviate from conventional or accepted usage or behavior, especially in odd or whimsical ways.

It is also used technically to mean "deviating from a circular path" and "located elsewhere than at the geometric center."

// He's an endearingly eccentric scientist whose methods are quite inventive.

// The dwarf planet Pluto has an eccentric orbit.