Synonyms

Aerate means to introduce air or carbon dioxide into something. Carbonate means to treat or combine with carbon dioxide - which is introducing CO2 gas. Hostile, list, and offend are completely unrelated.

Revolting means causing disgust or strong distaste. Ugly is an approximate synonym in the sense that something revolting is visually or morally offensive, though more precise synonyms would be disgusting or repulsive. Discredit and Order are unrelated.

Ambiguous and equivocal are direct synonyms, both meaning having more than one possible meaning or interpretation. The other options (Stop, Stress) are unrelated to the concept of ambiguity.

Both mean mandate/ command

Aggravating means causing irritation or annoyance, making irritating a direct synonym. Insert means to place something, and Polymerization is a chemical process - neither relates to the meaning of aggravating.

Disposition primarily means a person's inherent qualities or temperament. Settlement can be a synonym only in specific legal contexts (disposing of a case), but Emblem and Embargo are completely unrelated. This is a weak synonym match.

Delude means to mislead or deceive someone, making mislead a direct synonym. Missile is a weapon, Comer is not related to deception, and None of these is incorrect since mislead is the correct answer.

Harmonizing means making consistent or compatible, often through agreement. Agreeing is a direct synonym in the context of bringing things into alignment or accord. Ugly and Shocked are unrelated.

Colloquy refers to a formal conversation or dialogue, especially between two people. Debate is a reasonable synonym as it involves formal discussion and exchange of views. The other options are unrelated.

Safeguard means to protect or ensure safety. Shield works as both a noun (protective device) and verb (to protect), making it an accurate synonym. Ceramic refers to a material, large is size-related, and certainty is a different concept.

Counterpane (usually one word) means a bedspread or bed cover. The spelling as two words is a minor variant. Enemy means opponent, resemble means to look like, and none of these is incorrect.

Maltreat means to treat badly or abuse. Damage means to harm or cause injury, which is a reasonable approximation, though not an exact synonym. Dammed means blocked (like a river), notorious means famous for bad qualities, and none of these is incorrect.