Notably is a related term of principally.
As adverbs the difference between notably and principally
is that notably is (focus) as a pointed example; in a notable manner while principally is in a primary manner; pertaining to the principal of a matter.
notably
English
Adverb
(
en adverb)
(focus) As a pointed example; in a notable manner.
principally
English
Adverb
(-)
In a primary manner; pertaining to the principal of a matter.