callous

As a noun boor

is bear.

As an adjective callous is

emotionally hardened; unfeeling and indifferent to the suffering/feelings of others.

As adjectives the difference between scathing and callous

is that scathing is harshly or bitterly critical while callous is emotionally hardened; unfeeling and indifferent to the suffering/feelings of others.

As a verb scathing

is .

As adjectives the difference between condescending and callous

is that condescending is assuming a tone of superiority, or a patronizing attitude while callous is emotionally hardened; unfeeling and indifferent to the suffering/feelings of others.

As a verb condescending

is .

As adjectives the difference between callous and disparaging

is that callous is emotionally hardened; unfeeling and indifferent to the suffering/feelings of others while disparaging is insulting, ridiculing.

As a verb disparaging is

present participle of lang=en.

As a noun disparaging is

disparagement.

As adjectives the difference between flippant and callous

is that flippant is glib; speaking with ease and rapidity while callous is emotionally hardened; unfeeling and indifferent to the suffering/feelings of others.

As an adjective callous

is emotionally hardened; unfeeling and indifferent to the suffering/feelings of others.

As a noun indifference is

indifference, uncaringness.

As adjectives the difference between concerned and callous

is that concerned is showing concern while callous is emotionally hardened; unfeeling and indifferent to the suffering/feelings of others.

As a verb concerned

is (concern).

As adjectives the difference between callous and didactic

is that callous is emotionally hardened; unfeeling and indifferent to the suffering/feelings of others while didactic is instructive or intended to teach or demonstrate, especially with regard to morality. (I.e., didactic poetry.

As a noun didactic is

a treatise on teaching or education.

As adjectives the difference between callous and impervious

is that callous is emotionally hardened; unfeeling and indifferent to the suffering/feelings of others while impervious is unaffected or unable to be affected by.

As adjectives the difference between courteous and callous

is that courteous is showing regard or thought for others; especially, displaying good manners or etiquette while callous is emotionally hardened; unfeeling and indifferent to the suffering/feelings of others.