Adverbs of Degree

Adverbs of degree can modify verbs, adjectives and other adverbs, and tell us the extent to which something happens.

almost
absolutely
awfully*
badly*
barely
completely
decidedly
deeply
enough
enormously
entirely
extremely
fairly
far
fully
greatly
hardly
highly
how
incredibly
indeed
intensely
just
least
less
little
lots
most
much
nearly
perfectly
positively
practically
pretty*
purely
quite
rather
really
scarcely
simply
so
somewhat
strongly
terribly*
thoroughly
too
totally
utterly
very
virtually
well

 

*informal

 

(taken from: https://www.englishclub.com/vocabulary/adverbs-degree.htm)