untraditional vs nontraditional

untraditional and nontraditional both are adjectives.

Word	Noun	Adjective	Verb	Adverb
untraditional	No	Yes	No	No
nontraditional	No	Yes	No	No

As adjectives, untraditional and nontraditional are synonyms defined as:

untraditional and nontraditional: not conforming to or in accord with tradition

untraditional (adjective)	nontraditional (adjective)
not conforming to or in accord with tradition	not conforming to or in accord with tradition