untoward vs indecorous

untoward and indecorous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
untoward	No	Yes	No	No
indecorous	No	Yes	No	No

As adjectives, untoward and indecorous are synonyms defined as:

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

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

untoward (adjective)	indecorous (adjective)
not in keeping with accepted standards of what is right or proper in polite society	lacking propriety and good taste in manners and conduct
contrary to your interests or welfare	not in keeping with accepted standards of what is right or proper in polite society