Synonyms of isolationist

1 Syllable

rube, straight, strict, lame

2 Syllables

prosaic, narrow, solemn, sober, stuffy, moral, square, rigid, ruber, drippy, humdrum, bourgeois, hackneyed, uptight

3 Syllables

bigoted, routine, parochial, straight-laced, hidebound, pedestrian, demure, conforming, dogmatic, doctrinal, literal, insular

4 Syllables

moderate, commonplace, narrow-minded, obstinate, inflexible, illiberal, stereotyped, run-of-the-mill

5 Syllables

puritanical, conservative