“Defunct” means no longer existing, functioning, or in use.
“Obsolete” also refers to something that has become outdated or no longer in operation. Both words describe things that have ceased to exist or lost their usefulness.

Similar Words: Extinct, Nonexistent, Vanished, Outdated, Inoperative, Obsolete, Disused.

“Courteous” means showing good manners, respect, and consideration toward others.
“Polite” also means behaving in a respectful and well-mannered way. Both words describe someone who acts with kindness, respect, and social grace.

Similar Words: Civil, Respectful, Gracious, Well-mannered, Considerate, Polite, Gallant.

“Decry” means to publicly denounce or criticize something strongly.
“Vilify” also means to speak or write about someone in an abusively disparaging or derogatory way; to defame or slander.

Similar Words: Denounce, Criticize, Censure, Blame, Disparage, Condemn, Reproach.

“Debacle” means a sudden and complete failure or collapse, often involving chaos or humiliation.
“Disarray” also refers to a state of disorder, confusion, or lack of organization.

Similar Words: Catastrophe, Fiasco, Collapse, Calamity, Disarray, Ruin, Breakdown, Disaster.

“Corpulent” means having a large, bulky, or fat body.
“Obese” also describes someone who is excessively overweight or fat. Both words convey the sense of being heavy or fleshy in body size.

Similar Words: Fat, Stout, Overweight, Plump, Chubby, Heavy, Obese.

“Cursory” means done quickly and without giving enough attention to details.
“Hasty” also describes something done in a rushed or superficial manner. Both words imply a lack of carefulness or depth in doing something.

Similar Words: Superficial, Rapid, Brief, Perfunctory, Quick, Inattentive, Hasty.

“Copious” means large in quantity or number; plentiful or abundant.
“Plenty” also means a large or sufficient amount of something. Its core meaning is that there is enough, or more than enough, to meet a need or demand.

Similar Words: Plentiful, Ample, Lavish, Profuse, Overflowing, Generous, Abundant.

“Conjecture” means an opinion or conclusion formed on the basis of incomplete information; a speculation or guess.
“Surmise” also refers to a conclusion or guess without having complete evidence; to infer or conjecture.

Similar Words: Supposition, Assumption, Speculation, Hypothesis, Inference, Guess, Presumption.

“Confound” means to cause surprise or confusion in someone, often by acting unexpectedly or making something hard to understand.
“Perplex” also means to confuse or bewilder someone by making a situation difficult to comprehend. Both words express the sense of puzzling or baffling someone.

Similar Words: Bewilder, Puzzle, Baffle, Confuse, Mystify, Astonish, Perplex.

“Clandestine” means kept or done in secret, often to conceal an illicit or improper purpose.
“Arcane” also refers to something hidden that the information is restricted to an inner circle, often making it esoteric or even magical to outsiders.

Similar Words: Arcane, Covert, Hidden, Stealthy, Underground, Surreptitious, Concealed, Secret.