unkind

As adjectives the difference between bitter and unkind

is that bitter is having an acrid taste (usually from a basic substance) while unkind is having no race or kindred; childless.

As a noun bitter

is a liquid or powder, made from bitter herbs, used in mixed drinks or as a tonic.

As a verb bitter

is to make bitter.

Unkind is a related term of vengeful.

As adjectives the difference between unkind and vengeful

is that unkind is (obsolete) having no race or kindred; childless while vengeful is vindictive or wanting vengeance.

Cantankerous is a related term of unkind.

As adjectives the difference between cantankerous and unkind

is that cantankerous is given to or marked by an ill-tempered nature, ill-tempered, cranky, surly, crabby while unkind is (obsolete) having no race or kindred; childless.

In obsolete terms the difference between unkind and rough

is that unkind is having no race or kindred; childless while rough is boisterous weather.

As a noun rough is

the unmowed part of a golf course.

As a verb rough is

to create in an approximate form.

As an adverb rough is

in a rough manner; rudely; roughly.

Hostile is a related term of unkind.

As adjectives the difference between hostile and unkind

is that hostile is belonging or appropriate to an enemy; showing the disposition of an enemy; showing ill will and malevolence, or a desire to thwart and injure; occupied by an enemy or enemies; inimical; unfriendly while unkind is (obsolete) having no race or kindred; childless.

As a noun hostile

is (chiefly|in the plural) an enemy.

Unkind is a related term of brutal.

As adjectives the difference between unkind and brutal

is that unkind is (obsolete) having no race or kindred; childless while brutal is (senseid)savagely violent, vicious, ruthless, or cruel.

Unkind is a related term of hard.

As an adjective unkind

is (obsolete) having no race or kindred; childless.

As a noun hard is

stove, heater; an enclosed space in which fuel (usually wood) is burned to provide heating, usually for cooking.

Vile is a related term of unkind.

As adjectives the difference between vile and unkind

is that vile is morally low; base; despicable while unkind is (obsolete) having no race or kindred; childless.

Ugly is a related term of unkind.

As adjectives the difference between ugly and unkind

is that ugly is displeasing to the eye; not aesthetically pleasing while unkind is (obsolete) having no race or kindred; childless.

As a noun ugly

is (slang|uncountable) ugliness.

Foul is a related term of unkind.

As a noun foul

is foul (a breach of the rules of a game).

As an adjective unkind is

(obsolete) having no race or kindred; childless.