As adverbs the difference between chiefly and significantly
is that chiefly is (focus) especially or primarily; above all while significantly is in a significant manner or to a significant extent.
As an adjective chiefly
is of, or relating to a chief.
chiefly
English
Adverb
(
en adverb)
(focus) especially or primarily; above all
(focus) mainly or principally; almost entirely
significantly
English
Adverb
(-)
In a significant manner or to a significant extent.
Synonyms
* way