As nouns the difference between bitterness and cruelty
is that bitterness is the quality of having a bitter taste while cruelty is (uncountable) an indifference to suffering or positive pleasure in inflicting suffering.
bitterness
English
Noun
the quality of having a bitter taste
the quality of feeling bitter; acrimony, resentment
Synonyms
* (quality of being bitter in taste) acerbicness, acridity, acridness
* (quality of feeling bitter) acrimony, gall, rancor/rancour, resentment
cruelty
English
Alternative forms
* cruellty (obsolete)
* cruelltie (obsolete)
Noun
(uncountable) an indifference to suffering or positive pleasure in inflicting suffering.
(countable) a cruel act
Anagrams
* cutlery