Difference between Dreadful and Unpleasant

DREADFUL vs UNPLEASANT: NOUN

That which is fearful or terrible: used only in the phrases penny dreadful, shilling dreadful, to denote a tale of vulgar sensationalism sold at a small price, or a cheap sensational newspaper or periodical.
A shocking or sensational crime.
A shocking or sensational report of a crime.

I. Full of dread or fear.
Full of respect, honor, or veneration.
Extremely disagreeable and unpleasant
Exciting or attended by great dread, fear, or terror; terrible; formidable; direful: as, a dreadful storm; a dreadful invasion.
Awful; venerable; awe-inspiring.
Synonyms Fearful, Frightful, etc. (see awful); terrific, horrible, horrid, dire, direful, tremendous.

Fearsome, Dreaded, Alarming, Painful, Unspeakable, Dire, Unpleasant, Frightening, Bad, Abominable, Horrific, Awful, Atrocious, Terrible, Horrendous

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

Fearsome, Dreaded, Alarming, Painful, Unspeakable, Dire, Unpleasant, Frightening, Bad, Abominable, Horrific, Awful, Atrocious, Terrible, Horrendous

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

Asda, absolutely dreadful, low alcohol and no taste.
It is both an encouraging and dreadful event.
Shiloh has been a dreadful blow to us.
It may have been that dreadful Queensway Cathedral.
Dreadful system and unfair on so many levels.
He has moved to somewhere that is dreadful.
She told Jury about the whole dreadful experience.
Attitude: It is dreadful to be in danger.
The old way is absolutely dreadful in comparison.
The emotion inspired by something dreadful and sublime; an undefined sense of the dreadful and the sublime; reverential fear, or solemn wonder; profound reverence.

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.