actively

As an adverb actively

is in an active manner.

As an adjective proactive is

acting in advance to deal with an expected change or difficulty.

Zealously is a related term of actively.

As adverbs the difference between zealously and actively

is that zealously is like a zealot; with zealotry while actively is in an active manner.

As adverbs the difference between progressively and actively

is that progressively is in a progressive manner while actively is in an active manner.

As adverbs the difference between actively and flexibly

is that actively is in an active manner while flexibly is in a flexible manner.

As adverbs the difference between actively and seriously

is that actively is in an active manner while seriously is (manner) in a serious or literal manner.

As an adverb actively is

in an active manner.

As an adverb actively

is in an active manner.

As a noun activity is

the state or quality of being active; nimbleness; agility; vigorous action or operation; energy; active force; as, an increasing variety of human activities.

As adverbs the difference between actively and proactively

is that actively is in an active manner while proactively is in a proactive manner; so as to look or plan ahead.

As adverbs the difference between widely and actively

is that widely is commonly; generally; to a great degree while actively is in an active manner.