Final answer:
Cacophony is the concept of grouping words together to create a harsh, grating sound in poetry or literature.
Step-by-step explanation:
The concept you are describing is called cacophony.
Cacophony refers to the intentional use of harsh, discordant, or grating sounds in poetry or literature. It is used to create a jarring or unsettling effect on the reader or listener.
An example of cacophony can be seen in the poem excerpts you provided, where words and sounds are grouped together to create a harsh and unpleasant auditory experience.
Other examples of cacophony in literature include:
The shrill noise of the cacophony echoed throughout the town.
The harsh, grating sound of the machine filled the room.