greatly

As adverbs the difference between undoubtedly and greatly

is that undoubtedly is without doubt while greatly is (archaic) nobly; magnanimously.

As adverbs the difference between reluctantly and greatly

is that reluctantly is in a reluctant or hesitant manner while greatly is (archaic) nobly; magnanimously.

As adverbs the difference between greatly and sincerely

is that greatly is (archaic) nobly; magnanimously while sincerely is in a sincere or earnest manner; honestly.

As an adverb greatly

is (archaic) nobly; magnanimously.

As an adjective undefined is

lacking a definition or value.

As adverbs the difference between greatly and excessively

is that greatly is (archaic) nobly; magnanimously while excessively is to an excessive degree.

As an adjective greatest

is (great).

As an adverb greatly is

(archaic) nobly; magnanimously.

As adverbs the difference between greatly and pretty

is that greatly is nobly; magnanimously while pretty is somewhat, fairly, quite; sometimes also (by meiosis) very.

As an adjective pretty is

cunning; clever, skilful.

As a noun pretty is

something that is pretty.

As a verb pretty is

to make pretty; to beautify.

As adverbs the difference between greatly and incredibly

is that greatly is nobly; magnanimously while incredibly is in an incredible manner; not to be believed.

As adverbs the difference between greatly and quite

is that greatly is nobly; magnanimously while quite is To the greatest extent or degree; completely, entirely.

As an interjection quite is

indicates agreement; "exactly so".

As a noun quite is

a series of passes made with the cape to distract the bull.