Difference between Quietly and Stealthily

QUIETLY vs STEALTHILY: ADVERB

In a quiet manner.
Noiselessly; silently; without remark or violent movement; in a manner to attract little or no observation.
In a quiet state or manner; without motion; in a state of rest.
In a restful manner
With low volume
With little or no activity or no agitation (`quiet' is a nonstandard variant for `quietly')
With little or no sound

In a manner to attract little or no observation; without noise: as, he quietly left the room.
Calmly; tranquilly; without agitation or violent emotion; patiently.
Without tumult, alarm, dispute, or disturbance; peaceably: as, to live quietly.
In a quiet state or manner.

Delicately, Gently, Blithely, Coolly, Discretely, Cautiously, Happily, Stealthily, Calmly, Unobtrusively, Slowly, Discreetly, Silently, Restfully, Softly

Purposefully, Slowly, Unobtrusively, Noiselessly, Silently, Cunningly, Clandestinely, Insidiously, Discreetly, Covertly, Sneakily, Furtively, Secretly, Quietly, Surreptitiously

Discreet, Humbly, Nicely, Comfortably, Secretly, Gently, Blithely, Coolly, Cautiously, Stealthily, Calmly, Slowly, Silently, Restfully, Softly

Smartly, Briskly, Skilfully, Swiftly, Imperceptibly, Cleverly, Slyly, Craftily, Slowly, Noiselessly, Silently, Covertly, Secretly, Quietly, Surreptitiously

He just sat there quietly, and watched TV.
This pump quietly aerates eight gallons of water.
She quietly won and it left everyone speechless.
Move quietly and slip past the enemy patrols.
To describe a verb They are studying quietly.
Prescriptivism resists the latter; descriptivism quietly observes both.
The machines record what is happening in your heart and arteries, first as you sit quietly, and then as you stand quietly.
Tracy, as ever, is quietly impressive, more quietly than in later career and, compared to the older, more affected actor, more natural at thirty.
Would fail she quietly asked me to leave the room quietly clause and to tell how an action takes.
Our principal modeled walking in and sitting quietly, applauding appropriately, and exiting quietly.