unkind

Surly is a related term of unkind.

In obsolete|lang=en terms the difference between surly and unkind

is that surly is (obsolete) in an arrogant or supercilious manner while unkind is (obsolete) having no race or kindred; childless.

As adjectives the difference between surly and unkind

is that surly is (obsolete) lordly, arrogant, supercilious while unkind is (obsolete) having no race or kindred; childless.

As an adverb surly

is (obsolete) in an arrogant or supercilious manner.

As adjectives the difference between unfriendly and unkind

is that unfriendly is not friendly; hostile; mean while unkind is having no race or kindred; childless.

As a noun unfriendly

is an enemy.

Illnatured is likely misspelled.

Illnatured has no English definition.

As an adjective unkind is

having no race or kindred; childless.

Merciless is a related term of unkind.

As adjectives the difference between merciless and unkind

is that merciless is showing no mercy; cruel and pitiless while unkind is (obsolete) having no race or kindred; childless.

Unkind is a related term of heartless.

As adjectives the difference between unkind and heartless

is that unkind is (obsolete) having no race or kindred; childless while heartless is without a heart; specifically, without feeling, emotion, or concern for others; uncaring.

Cross is a related term of unkind.

As a proper noun cross

is for someone who lived near a stone cross on a road.

As an adjective unkind is

(obsolete) having no race or kindred; childless.

As an adjective unkind is

(obsolete) having no race or kindred; childless.

As adjectives the difference between uncivilised and unkind

is that uncivilised is while unkind is (obsolete) having no race or kindred; childless.

Unkind is a related term of acrimonious.

As adjectives the difference between unkind and acrimonious

is that unkind is (obsolete) having no race or kindred; childless while acrimonious is angry, acid, and sharp in delivering argumentative replies: bitter; mean-spirited; sharp in language or tone.

As adjectives the difference between spiteful and unkind

is that spiteful is filled with, or showing, spite; having a desire to vex, annoy, or injure; malignant; malicious while unkind is having no race or kindred; childless.