Fall back and Fading away

Fall back verb - To move back or away (as from something difficult, dangerous, or disagreeable).

Fading away and fall back are semantically related In some cases you can use "Fading away" instead a verb "Fall back".

Fading away noun - Gradually diminishing in brightness or loudness or strength.

Fall back and fading away are semantically related in subside topic. You can use "Fall back" instead a verb "Fading away".