Here's what rhymes with rationalist.

Consider these alternatives

rationalism / given humanism / given rationalists / nationalists idealist / realist propounded / founded naturalism / given materialist / imperialist dogmatic / dramatic empiricism / given positivism / given agnosticism / given advaita / data theistic / characteristic existentialism / given universalism / given postmodern / modern modernism / given objectivist / nonobjectivist neoclassicism / given anarchism / given liberalism / given constructivism / given