adverse vs untoward

adverse and untoward both are adjectives.

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

As adjectives, adverse and untoward are synonyms defined as:

Other synonyms of adverse include inauspicious.

adverse (adjective)	untoward (adjective)
in an opposing direction	not in keeping with accepted standards of what is right or proper in polite society
contrary to your interests or welfare	contrary to your interests or welfare