Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun extremist

1 sense of extremist

Sense 1
extremist -- (a person who holds extreme views)
       => radical -- (a person who has radical ideas or opinions)

Antonyms of adj extremist

1 sense of extremist

Sense 1
extremist, radical, ultra -- ((used of opinions and actions) far beyond the norm; "extremist political views"; "radical opinions on education"; "an ultra conservative")

INDIRECT (VIA immoderate) -> moderate -- (being within reasonable or average limits; not excessive or extreme; "moderate prices"; "a moderate income"; "a moderate fine"; "moderate demands"; "a moderate estimate"; "a moderate eater"; "moderate success"; "a kitchen of moderate size"; "the X-ray showed moderate enlargement of the heart")

Similarity of adj extremist

1 sense of extremist

Sense 1
extremist, radical, ultra -- ((used of opinions and actions) far beyond the norm; "extremist political views"; "radical opinions on education"; "an ultra conservative")
       => immoderate (vs. moderate) -- (beyond reasonable limits; "immoderate laughter"; "immoderate spending")