Difference between Unpleasant and Disastrous

UNPLEASANT vs DISASTROUS: ADJECTIVE

(of events) having extremely unfortunate or dire consequences; bringing ruin
Accompanied by or causing distress or disaster; calamitous.
Extremely bad; terrible.
Full of unpropitious stellar influences; unpropitious; ill-boding.
Attended with suffering or disaster; very unfortunate; calamitous; ill-fated; ending in utter failure or ruin
Of the nature of a disaster; calamitous.
Foreboding disaster; ill-omened.

Bringing ruin
Ruinous; unfortunate; calamitous; occasioning great distress or injury: as, the day was disastrous; the battle proved disastrous.
Gloomy; dismal; threatening disaster.

Unhappy, Caustic, Acrid, Mortifying, Bitter, Unlovely, Grim, Obnoxious, Hellish, Harsh, Dreadful, Awful, Embarrassing, Nasty, Painful

Wretched, Abysmal, Miserable, Terrible, Horrendous, Ruinous, Dismal, Catastrophic, Devastating, Dreadful, Black, Fatal, Fateful, Unfortunate, Calamitous

Unhappy, Caustic, Acrid, Mortifying, Bitter, Unlovely, Grim, Obnoxious, Hellish, Harsh, Dreadful, Awful, Embarrassing, Nasty, Painful

Wretched, Abysmal, Miserable, Terrible, Horrendous, Ruinous, Dismal, Catastrophic, Devastating, Dreadful, Black, Fatal, Fateful, Unfortunate, Calamitous

II Stonedll driving is unpleasant, say marijuana smokers.
At its worst, it is painful and unpleasant.
And that presents a number of unpleasant symptoms.
Someone that is old, wrinkly and generally unpleasant.
Being set up for failure is incredibly unpleasant.
It left such a sticky and unpleasant film.
You meet your Tour MENTOR andthe UNPLEASANT STRANGER.
In general, pictures of death are less unpleasant, elicit less arousal, and have greater dominance than unpleasant pictures.
Similarly, the spiciness of black pepper is unpleasant to some people so it might also be unpleasant for rats.
Because punishment is unpleasant, it can also trigger aggression just like other unpleasant events.

To continue this disastrous alliance longer is madness.
This war was extremely disastrous to the colonies.
Maryland Democratic Party since the disastrous Rain Tax.
If not at once it will be disastrous.
Its removal can be nothing short of disastrous.
Making a quick purchase will likely be disastrous.
You very probably find the result completely disastrous.
We might want to cut off disastrous possibilities.
My last experience with this airline was disastrous.
Changing one disastrous energy source for a slightly less disastrous one is not progress.