The difference between Cool and Easy

When used as nouns, cool means a moderate or refreshing state of cold, whereas easy means something that is easy.

When used as adjectives, cool means having a slightly low temperature, whereas easy means comfortable.

Cool is also verb with the meaning: to lose heat, to get colder.

Easy is also adverb with the meaning: in a relaxed or casual manner.

check bellow for the other definitions of Cool and Easy

Cool as an adjective:

Having a slightly low temperature; mildly or pleasantly cold.
Cool as an adjective:

Allowing or suggesting heat relief.

Examples:

"a cool grey colour"
Cool as an adjective:

Of a person, not showing emotion; calm and in control of oneself.
Cool as an adjective:

Unenthusiastic, lukewarm, skeptical.

Examples:

"His proposals had a cool reception."
Cool as an adjective:

Calmly audacious.

Examples:

"In control as always, he came up with a cool plan."
Cool as an adjective:
Cool as an adjective (informal):

Of a person, knowing what to do and how to behave; considered popular by others.
Cool as an adjective (informal):

In fashion, part of or fitting the in crowd; originally hipster slang.
Cool as an adjective (informal):

Of an action, all right; acceptable; that does not present a problem.

Examples:

"Is it cool if I sleep here tonight?"
Cool as an adjective (informal):

Of a person, not upset by circumstances that might ordinarily be upsetting.

Examples:

"I'm completely cool with my girlfriend leaving me."

Cool as a noun:

A moderate or refreshing state of cold; moderate temperature of the air between hot and cold; coolness.

Examples:

"in the cool of the morning"
Cool as a noun:

A calm temperament.

Examples:

"synonyms: calmness composure"
Cool as a noun:

The property of being cool, popular or in fashion.

Cool as a verb (intransitive, literally):

To lose heat, to get colder.

Examples:

"I like to let my tea cool before drinking it so I don't burn my tongue."
Cool as a verb (transitive):

To make cooler, less warm.
Cool as a verb (figuratively, intransitive):

To become less intense, e.g. less amicable or passionate.

Examples:

"Relations cooled between the USA and the USSR after 1980."
Cool as a verb (transitive):

To make less intense, e.g. less amicable or passionate.
Cool as a verb (transitive):

To kill.

Easy as an adjective (now, rare, _, except in certain expressions):

Comfortable; at ease.

Examples:

"Now that I know it's taken care of, I can rest easy at night."
Easy as an adjective:

Requiring little skill or effort.

Examples:

"It's often easy to wake up but hard to get up."

"The teacher gave an easy test to her students."
Easy as an adjective:

Causing ease; giving comfort, or freedom from care or labour.

Examples:

"Rich people live in easy circumstances."

"an easy chair"
Easy as an adjective:

Free from constraint, harshness, or formality; unconstrained; smooth.

Examples:

"easy manners; an easy style"
Easy as an adjective (informal, pejorative, of a person):

Consenting readily to sex.

Examples:

"He has a reputation for being easy; they say he slept with half the senior class."
Easy as an adjective:

Not making resistance or showing unwillingness; tractable; yielding; compliant.
Easy as an adjective (finance, dated):

Not straitened as to money matters; opposed to .

Examples:

"The market is easy."

Easy as an adverb:

In a relaxed or casual manner.

Examples:

"After his illness, John decided to [[take it easy take it easy]]."
Easy as an adverb:

In a manner without strictness or harshness.

Examples:

"Jane went easier on him after he broke his arm."
Easy as an adverb:

Used an intensifier for large magnitudes.

Examples:

"This project will cost 15 million dollars, easy."
Easy as an adverb:

Not difficult, not hard.