relentless

As adjectives the difference between relentless and cruel

is that relentless is unrelenting or unyielding in severity while cruel is not nice; mean; heartless.

As a verb cruel is

to spoil or ruin (one's chance of success.

Gloomy is a related term of relentless.

As adjectives the difference between gloomy and relentless

is that gloomy is imperfectly illuminated; dismal through obscurity or darkness; dusky; dim; clouded while relentless is unrelenting or unyielding in severity.

As adjectives the difference between resolute and relentless

is that resolute is firm, unyielding, determined while relentless is unrelenting or unyielding in severity.

As adjectives the difference between brutish and relentless

is that brutish is of, or in the manner of a brute while relentless is unrelenting or unyielding in severity.

Merciless is a synonym of relentless.

As adjectives the difference between merciless and relentless

is that merciless is showing no mercy; cruel and pitiless while relentless is unrelenting or unyielding in severity.

As adjectives the difference between sombre and relentless

is that sombre is dark; gloomy while relentless is unrelenting or unyielding in severity.

As a noun sombre

is gloom; obscurity; duskiness.

As a verb sombre

is to make sombre or dark; to make shady.

As adjectives the difference between brutal and relentless

is that brutal is (senseid)savagely violent, vicious, ruthless, or cruel while relentless is unrelenting or unyielding in severity.

As adjectives the difference between repentless and relentless

is that repentless is (archaic) unrepentant while relentless is unrelenting or unyielding in severity.

As adjectives the difference between relentless and driven

is that relentless is unrelenting or unyielding in severity while driven is obsessed; passionately motivated to achieve goals.

As a verb driven is

past participle of lang=en.

As adjectives the difference between relentless and despondent

is that relentless is unrelenting or unyielding in severity while despondent is in low spirits from loss of hope or courage.