What does "theorist" mean?

Someone who constructs theories, especially in the arts or sciences.

What is a synonym for "theorist"?

Common synonyms include: theorizer, academic, advocate, armchair, armchair theorist, atavist.

/ˈθɪəɹɪst/ noun

noun ·Uncommon ·College level

Noun

1
Someone who constructs theories, especially in the arts or sciences.
"Some of the most beautiful and thus appealing physical theories, including quantum electrodynamics and quantum gravity, have been dogged for decades by infinities that erupt when theorists try to prod their calculations into new domains."
2
someone who theorizes (especially in science or art) wordnet

"As a conspiracy theorist, Tom is always in a certain amount of danger."

From theory + -ist.