The noun form for the adjective disastrous is disastrousness.The word 'disastrous' is the adjective form of the noun disaster.
The word 'disastrous' is the adjective form of the abstract noun disaster.
What you are saying is a word, but it is spelled disastrous.
disastrous
The word is spelled disastrous.
Something disastrous out come
Disastrous has three syllables but, yes, an extra syllable is often added in speech due to the relationship between this word and the word disaster.
The noun 'tragedy' is a singular, common, abstract noun; a word for a disastrous or distressing event; a word for a type of story, play, movie, etc. based on something sad or disastrous; a word for a concept; a word for a thing.
People died from a disastrous famine.
The adjective form for the noun disaster is disastrous.
"Conflagration" is a word meaning a disastrous fire.
Adverse is a synonym for disastrous. It begins with the letter A.