The difference between Cloud and Opaque

When used as nouns, cloud means a rock, whereas opaque means an area of darkness.

When used as verbs, cloud means to become foggy or gloomy, or obscured from sight, whereas opaque means to make, render (more) opaque.

Opaque is also adjective with the meaning: neither reflecting nor emitting light.

check bellow for the other definitions of Cloud and Opaque

Cloud as a noun (obsolete):

A rock; boulder; a hill.
Cloud as a noun:

A visible mass of water droplets suspended in the air.
Cloud as a noun:

Any mass of dust, steam or smoke resembling such a mass.
Cloud as a noun:

Anything which makes things foggy or gloomy.
Cloud as a noun (figurative):

Anything unsubstantial.
Cloud as a noun:

A dark spot on a lighter material or background.
Cloud as a noun:

A group or swarm, especially suspended above the ground or flying.

Examples:

"He opened the door and was greeted by a cloud of bats."
Cloud as a noun:

An elliptical shape or symbol whose outline is a series of semicircles, supposed to resemble a cloud.

Examples:

"The comic-book character's thoughts appeared in a cloud above his head."
Cloud as a noun (computing, with "the"):

The Internet, regarded as an abstract amorphous omnipresent space for processing and storage, the focus of cloud computing.
Cloud as a noun (figuratively):

A negative or foreboding aspect of something positive: see every cloud has a silver lining or every silver lining has a cloud.
Cloud as a noun (slang):

Crystal methamphetamine.
Cloud as a noun:

A large, loosely-knitted headscarf worn by women.

Cloud as a verb (intransitive):

To become foggy or gloomy, or obscured from sight.

Examples:

"The glass clouds when you breathe on it."
Cloud as a verb (transitive):

To overspread or hide with a cloud or clouds.

Examples:

"The sky is clouded."
Cloud as a verb (transitive):

To make obscure.

Examples:

"All this talk about human rights is clouding the real issue."
Cloud as a verb (transitive):

To make less acute or perceptive.

Examples:

"Your emotions are clouding your judgement."

"The tears began to well up and cloud my vision."
Cloud as a verb (transitive):

To make gloomy or sullen.
Cloud as a verb (transitive):

To blacken; to sully; to stain; to tarnish (reputation or character).
Cloud as a verb (transitive):

To mark with, or darken in, veins or sports; to variegate with colours.

Examples:

"to cloud yarn"
Cloud as a verb (intransitive):

To become marked, darkened or variegated in this way.

Opaque as an adjective:

Neither reflecting nor emitting light.
Opaque as an adjective:

Allowing little light to pass through, not translucent or transparent.
Opaque as an adjective (figuratively):

Unclear, unintelligible, hard to get or explain the meaning of
Opaque as an adjective (figuratively):

Obtuse, stupid.
Opaque as an adjective (computing):

Describes a type for which higher-level callers have no knowledge of data values or their representations; all operations are carried out by the type's defined abstract operators.

Opaque as a noun (obsolete, poetic):

An area of darkness; a place or region with no light.
Opaque as a noun:

Something which is opaque rather than translucent.