significantly vs importantly

significantly and importantly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
significantly	No	No	No	Yes
importantly	No	No	No	Yes

As adverbs, significantly and importantly are synonyms defined as:

significantly and importantly: in an important way or to an important degree

significantly (adverb)	importantly (adverb)
in an important way or to an important degree	in an important way
in a significant manner	in an important way or to an important degree
in a statistically significant way