As adjectives the difference between appalling and disastrous
is that appalling is horrifying and astonishing while disastrous is of the nature of a disaster; calamitous.
As a verb appalling
is present participle of lang=en.
appalling
English
Verb
(head)
Adjective
(
en adjective)
Horrifying and astonishing.
- That was an appalling waste of money.
Usage notes
* Not to be confused with appealing.
Synonyms
* awful, grotesque, horrid, hideous, terrible
Derived terms
* appallingly
disastrous
English
Adjective
(
en adjective)
of the nature of a disaster; calamitous.
foreboding disaster; ill-omened.
Synonyms
* (calamitous) cataclysmic, catastrophic
* (ill-omened) ill-boding, , sinister
Derived terms
* disastrously