Sombre is a related term of heartless.

As a verb sombre

is .

As an adjective heartless is

without a heart; specifically, without feeling, emotion, or concern for others; uncaring.

As verbs the difference between kink and craze

is that kink is to laugh loudly while craze is to weaken; to impair; to render decrepit.

As nouns the difference between kink and craze

is that kink is a convulsive fit of coughing or laughter; a sonorous indraft of breath; a whoop; a gasp of breath caused by laughing, coughing, or crying while craze is craziness; insanity.

Clever is a related term of wily.

As adjectives the difference between clever and wily

is that clever is nimble with hands or body; skillful; adept while wily is sly, cunning, full of tricks.

Overclouded is a related term of murky.

As a verb overclouded

is (overcloud).

As a proper noun murky is

(murcki), a locale in poland.

Dull is a synonym of thick.

As adjectives the difference between dull and thick

is that dull is lacking the ability to cut easily; not sharp while thick is relatively great in extent from one surface to the opposite in its smallest solid dimension.

As verbs the difference between dull and thick

is that dull is to render dull; to remove or blunt an edge or something that was sharp while thick is (archaic|transitive) to thicken.

As an adverb thick is

in a thick manner.

As a noun thick is

the thickest, or most active or intense, part of something.

Flare is a related term of coruscate.

In lang=en terms the difference between flare and coruscate

is that flare is to cause to burn while coruscate is to exhibit brilliant technique or style.

As verbs the difference between flare and coruscate

is that flare is to blaze brightly while coruscate is to give off light; to reflect in flashes; to sparkle.

As a noun flare

is a source of brightly burning light or intense heat used to attract attention in an emergency, to illuminate an area, or as a decoy.

Opposition is a related term of rancour.

As nouns the difference between opposition and rancour

is that opposition is the opposition, political opposition; opposition party while rancour is .

Country is a synonym of commonwealth.

As a noun country

is (label) an area of land; a district, region.

As an adjective country

is from or in the countryside or connected with it.

As a proper noun commonwealth is

the commonwealth of nations, a loose confederation of nations based around the former british empire.

As nouns the difference between cache and mass

is that cache is a store of things that may be required in the future, which can be retrieved rapidly, protected or hidden in some way while mass is matter, material.

As verbs the difference between cache and mass

is that cache is to place in a cache while mass is to form or collect into a mass; to form into a collective body; to bring together into masses; to assemble.

As an adjective mass is

involving a mass of things; concerning a large quantity or number.

Rule is a related term of mandate.

As verbs the difference between rule and mandate

is that rule is while mandate is .