The difference between Silent and Soundless

When used as adjectives, silent means free from sound or noise, whereas soundless means without sound.

Silent is also noun with the meaning: that which is silent.

check bellow for the other definitions of Silent and Soundless

Silent as an adjective:

Free from sound or noise; absolutely still; perfectly quiet.
Silent as an adjective:

Not speaking; indisposed to talk; speechless; mute; taciturn; not loquacious; not talkative.
Silent as an adjective:

Keeping at rest; inactive; calm; undisturbed.

Examples:

"The wind is silent."

"rfquotek Parnell"

"rfquotek Sir Walter Raleigh"
Silent as an adjective ([[pronunciation]]):

Not pronounced; having no sound; quiescent.

Examples:

"The ''e'' is silent in ''fable''."

"Silent letters can make some words difficult to spell."
Silent as an adjective:

Having no effect; not operating; inefficient.
Silent as an adjective (technology):

With the sound turned off; usually on silent or in silent mode.

Examples:

"My phone was on silent."
Silent as an adjective (technology):

Without audio capability.

Examples:

"The Magnavox Odyssey was a silent console."
Silent as an adjective:

Hidden, unseen.

Examples:

"a silent voter; a silent partner"
Silent as an adjective:

Of an edit or change to a text, not explicitly acknowledged.

Examples:

"silent revisions; a silent emendation"
Silent as an adjective:

Not implying significant modifications which would affect a peptide sequence.
Silent as an adjective:

Undiagnosed or undetected because of an absence of symptoms.
Silent as an adjective:

Of distilled spirit: having no flavour or odour.

Silent as a noun (uncountable):

That which is silent; a time of silence.
Silent as a noun:

A silent movie