Synonyms of the word

cruel

• adj. Not nice; mean; heartless.
• adj. (slang) Cool; awesome; neat.
• v. (chiefly Australia, New Zealand) To spoil or ruin (one's chance of success).
• v. (Australia) To violently provoke (a child) in the belief that this will make them more assertive.

barbarous

• adj. (said of language) Not classical or pure.
• adj. uncivilized, uncultured.
• adj. Like a barbarian, especially in sound; noisy, dissonant.

brutal

• adj. Savagely violent, vicious, ruthless, or cruel.
• adj. Crude or unfeeling in manner or speech.
• adj. Harsh; unrelenting.
• adj. Disagreeably precise or penetrating.
• adj. (music, figuratively) In extreme metal, to describe the speed of the music and the density of riffs.

fell

• v. (transitive) To make something fall; especially to chop down a tree.
• v. (transitive) To strike down, kill, destroy.
• v. (sewing) To stitch down a protruding flap of fabric, as a seam allowance, or pleat.
• n. A cutting-down of timber.
• n. The stitching down of a fold of cloth; specifically, the portion of a kilt, from the waist to the seat,…
• n. (textiles) The end of a web, formed by the last thread of the weft.
• n. An animal skin, hide, pelt.
• n. Human skin (now only as a metaphorical use of previous sense).
• n. (archaic outside Britain) A rocky ridge or chain of mountains.
• n. (archaic outside Britain) A wild field or upland moor.
• adj. Of a strong and cruel nature; eagre and unsparing; grim; fierce; ruthless; savage.
• adj. (Britain dialectal, Scotland) Strong and fiery; biting; keen; sharp; pungent; clever.
• adj. (obsolete) Eager; earnest; intent.
• adv. Sharply; fiercely.
• n. Gall; anger; melancholy.
• n. (mining) The finer portions of ore, which go through the meshes when the ore is sorted by sifting.

inhumane

• adj. lacking pity or compassion for misery and suffering; cruel, unkind, not humane.

roughshod

• adj. (farriery) Of a horse: having hooves shod with calks or horseshoes that have projecting nails to prevent…
• adj. (by extension) Brutal or domineering.

savage

• adj. Wild; not cultivated.
• adj. Barbaric; not civilized.
• adj. Fierce and ferocious.
• adj. Brutal, vicious, or merciless.
• adj. (Britain, slang) Unpleasant or unfair.
• n. (pejorative) An uncivilized or feral human; a barbarian.
• n. (figuratively) A defiant person.
• v. To attack or assault someone or something ferociously or without restraint.
• v. (figuratively) To criticise vehemently.
• v. (of an animal) To attack with the teeth.
• v. (obsolete, transitive) To make savage.

vicious

• adj. Violent, destructive and cruel.
• adj. Savage and aggressive.
• adj. (archaic) Pertaining to vice; characterised by immorality or depravity.