As adjectives the difference between disastrous and nondisastrous
is that disastrous is of the nature of a disaster; calamitous while nondisastrous is not disastrous.
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