What is the antonym for demolish

& what is the antonym for imaginary

what is an antonym?

Before answering the question, it is important to establish and define what is an antonym.

Antonym: a word opposite in meaning to another word.

Let's define

demolish: destroy, consume, annihilate, crush.

Its antonym will be the opposite: build, construct, create

imaginary: fictitious, invented, abstract, fantastic.

Its antonym: factual, real, proven, ordinary.