Is there a word which is the same meaning as quickly and softly?

There isn't one single word that perfectly captures the combined meaning of "quickly and softly." However, there are a few options that come close depending on the specific context:

For movement:

* Silently: This emphasizes the lack of noise, but doesn't necessarily imply speed.

* Swiftly: This emphasizes speed, but doesn't explicitly mention quietness.

* Gently: This implies both soft movement and a lack of force, but doesn't necessarily mean quick.

* Discreetly: This suggests both quiet and stealthy movement.

For actions:

* Subtly: This suggests a delicate and subtle approach, often implying both speed and softness.

* Quietly: This emphasizes the lack of noise, but doesn't necessarily imply speed.

* Lightly: This suggests a gentle touch or action, which can be done quickly or slowly.

Figurative language:

* In a whisper: This conveys both quietness and quickness, especially when referring to speech.

* Like a feather: This implies lightness and delicacy, often suggesting swiftness.

The best choice will depend on the specific context and the nuance you want to convey.