becoming vs decorous

becoming and decorous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
becoming	No	Yes	No	No
decorous	No	Yes	No	No

As adjectives, becoming and decorous are synonyms defined as:

Other synonyms of becoming include comely, comme il faut, seemly.

becoming (adjective)	decorous (adjective)
displaying or setting off to best advantage	characterized by propriety and dignity and good taste in manners and conduct
according with custom or propriety	according with custom or propriety