Here's why:
* Round: The most common homophones for "round" are words like "rowed" (past tense of row) or "round" (as in a specific number). None of these relate to shouting.
* Shout Loudly: There are homophones for "shout," like "shot" (as in a firearm), but these don't relate to the concept of being round.
Possible Solutions:
* "Round" and "Shout" separately: You could use a homophone for "round" (like "rowed") and a homophone for "shout" (like "shot"). This would be two separate words, not one.
* "Round" and a homophone for "shout" with different meanings: You could use "round" and a homophone for "shout" that has a different meaning, like "shot" (referring to a photograph) - but this would be metaphorical and wouldn't be a literal homophone.
Let me know if you have other wordplay ideas, and I'll try my best to help!