'ness'
To create an abstract noun, add the suffix 'ness' - eg, angriness, happiness, silliness, boredness.
the suffix for quietness is ness
quietness of the countryside.
The homonym for "quietness" is "piece".
Not every word has a homophone and homophones cannot be 'made up'. Quietness and part don't have a homophone.
The homophone for "quietness" is "quietness," or "silence." A homophone for "a part" could be "apart," meaning separate or disconnected from something else.
The noun form of "quiet" is "quietness" or "silence".
To make no sound to make no movement.
peace, piece
For me, the poem quietness means peace.
An example could me: "The quietness and stillness in the night made it seem almost magical"
still
Some homophones for "quietness" include "quieten" and "quieting" which sound the same but have different meanings.