too vs likewise

too and likewise both are adverbs.

Word	Noun	Adjective	Verb	Adverb
too	No	No	No	Yes
likewise	No	No	No	Yes

As adverbs, too and likewise are synonyms defined as:

Other synonyms of too include also, as well, besides.

too (adverb)	likewise (adverb)
to a degree exceeding normal or proper limits	in like or similar manner
in addition	in addition
	equally