What is another word for complex?

Need synonyms for complex? Here's a list of words from our thesaurus that you can use instead.

Adjective
Difficult to analyze or understand
“Will Hunting was able to solve the complex math problem that had stumped everyone in class.”
Adjective
Made up of multiple and connected parts
“It was a complex structure of more than a hundred billion nerve cells.”
Noun
An assemblage or collection of related things
“He reflected on his past, which was now just a complex of memories and recollections.”
Noun
A psychological dislike or fear
“He started going to the gym because he had a complex about not being muscular enough.”
Noun
A collection of buildings
“Their corporate headquarters complex is called the Googleplex and is where staff spend their days discussing how to not be evil.”
Verb
(chemistry) To form a complex with another substance
“For the next step in the process, I will need to complex the protein with a specific lipid.”
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