in return vs reciprocally

in return and reciprocally both are adverbs.

Word	Noun	Adjective	Verb	Adverb
in return	No	No	No	Yes
reciprocally	No	No	No	Yes

As adverbs, in return and reciprocally are synonyms defined as:

in return and reciprocally: (often followed by `for') in exchange or in reciprocation

in return (adverb)	reciprocally (adverb)
(often followed by `for') in exchange or in reciprocation	in an inverse or contrary manner
	in a mutual or shared manner
	(often followed by `for') in exchange or in reciprocation