hard

Hard is a related term of keen.

As nouns the difference between hard and keen

is that hard is stove, heater; an enclosed space in which fuel (usually wood) is burned to provide heating, usually for cooking while keen is a prolonged wail for a deceased person.

As an adjective keen is

showing a quick and ardent willingness or responsiveness, enthusiastic, eager; interested, intense.

As a verb keen is

(rare) to sharpen; to make cold or keen can be to utter a keen.

Stupid is a related term of hard.

As nouns the difference between stupid and hard

is that stupid is a stupid person; a fool while hard is stove, heater; an enclosed space in which fuel (usually wood) is burned to provide heating, usually for cooking.

As an adjective stupid

is lacking in intelligence or exhibiting the quality of having been done by someone lacking in intelligence.

As an adverb stupid

is (slang|dated) extremely.

As adjectives the difference between hard and important

is that hard is having a severe property; presenting difficulty while important is having relevant and crucial value.

As an adverb hard

is with much force or effort.

As a noun hard

is a firm or paved beach or slope convenient for hauling vessels out of the water.

Hard is a synonym of melancholy.

As nouns the difference between hard and melancholy

is that hard is stove, heater; an enclosed space in which fuel (usually wood) is burned to provide heating, usually for cooking while melancholy is (historical) black bile, formerly thought to be one of the four "cardinal humours" of animal bodies.

As an adjective melancholy is

affected with great sadness or depression.

As nouns the difference between hard and frowning

is that hard is a firm or paved beach or slope convenient for hauling vessels out of the water while frowning is the act of giving a frown.

As an adjective hard

is having a severe property; presenting difficulty.

As an adverb hard

is with much force or effort.

As a verb frowning is

present participle of lang=en.

Hard is a related term of impenitent.

As a noun hard

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

As an adjective impenitent is

impenitent, unrepentant.

Exact is a related term of hard.

As an adjective exact

is precisely agreeing with a standard, a fact, or the truth; perfectly conforming; neither exceeding nor falling short in any respect.

As a verb exact

is to demand and enforce the payment or performance of.

As a noun hard is

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

Bitter is a related term of hard.

As nouns the difference between bitter and hard

is that bitter is (usually in the plural bitters) a liquid or powder, made from bitter herbs, used in mixed drinks or as a tonic while hard is stove, heater; an enclosed space in which fuel (usually wood) is burned to provide heating, usually for cooking.

As an adjective bitter

is having an acrid taste (usually from a basic substance).

As a verb bitter

is to make bitter.

Hard is a related term of sarcastic.

As a noun hard

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

As an adjective sarcastic is

sarcastic.

Hard is a synonym of stubborn.

As a noun hard

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

As an adjective stubborn is

refusing to move or to change one's opinion; obstinate; firmly resisting.