Humanitarian rhymes with:
unitarian, authoritarian, egalitarian, proletarian, unitarian, utilitarian, vegetarian, authoritarian, egalitarian, lauretarian, libertarian, majoritarian, nonsectarian, parliamentarian, proletarian, sectarian, terrien, totalitarian, unitarian, utilitarian, vegetarian
Humanitarian sounds like:
hanthorn, hendren, hendron, henthorn, henthorne, hinderman, honduran, humdrum