unbecoming vs indecent

unbecoming and indecent both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unbecoming	No	Yes	No	No
indecent	No	Yes	No	No

As adjectives, unbecoming and indecent are synonyms defined as:

unbecoming and indecent: not in keeping with accepted standards of what is right or proper in polite society

Other synonyms of unbecoming include indecorous, uncomely, unseemly, untoward.

unbecoming (adjective)	indecent (adjective)
not in keeping with accepted standards of what is right or proper in polite society	offensive to good taste especially in sexual matters
	offending against sexual mores in conduct or appearance
	not in keeping with accepted standards of what is right or proper in polite society