seemly vs becoming

seemly and becoming both are adjectives.

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

As adjectives, seemly and becoming are synonyms defined as:

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

seemly (adjective)	becoming (adjective)
according with custom or propriety	displaying or setting off to best advantage
	according with custom or propriety