terribly |
appallingly |
As adverbs the difference between terribly and appallingly
is that
terribly is causing terror or awe while
appallingly is in an appalling manner.
horrible |
appallingly |
As a noun horrible
is a thing that causes horror; a terrifying thing, particularly a prospective bad consequence asserted as likely to result from an act.
As an adjective horrible
is causing horror; terrible; shocking.
As an adverb appallingly is
in an appalling manner.