fitly vs properly

fitly and properly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
fitly	No	No	No	Yes
properly	No	No	No	Yes

As adverbs, fitly and properly are synonyms defined as:

fitly and properly: in accordance with what is appropriate or suitable for the circumstances

Other synonyms of fitly include appropriately, befittingly, duly, fittingly, suitably.

fitly (adverb)	properly (adverb)
in accordance with what is appropriate or suitable for the circumstances	in the right manner; correctly; suitably
	in accordance with what is appropriate or suitable for the circumstances
	indicating exactness or preciseness