Synonyms: Prefixes from Greek

"Primitive" means ancient.

"Synchronize" is a synonym of "coordinate." "Synchronize" means to make happen or work at the same rate and contains the prefixes "syn-",which means same; together, and "chrono-", which means time.

“Synthesis” is a noun that means “combination or composition,” and in particular, “the combination of ideas to form a theory or system.” So, we need to pick out an answer choice that means something like “combination.” That means that “dissociation” cannot be the correct answer, because “dissociation” means “the disconnection or separation of something from something else or the state of being disconnected,” making it an antonym, not a synonym, of “synthesis.” “Amalgamation,” however, means “the action, process, or result of combining or uniting,” and because “amalgamation” is the answer choice closest in meaning to “synthesis,” “amalgamation” is the correct answer.

"Amorphous" means without shape or form, so the correct answer is “formless.” For clarification, "shapely" means well-proportioned; "crafty" means sly and sneaky.

"Anonymous" means unnamed or unidentified, so "unnamed" is the correct answer. "Armed" means carrying weapons. "Determined" means intent or set on some course of action. "Crafty" means cunning or tricky. "Deceptive" means misleading or fraudulent.

A "cataclysm" or "catastrophe" is a terrible, often naturally occurring, event. These words are synonymous and share a greek prefix. The other words may have similar spellings, but they are not closely related in meaning to catastrophe.