Sounds like "cannons":
* Canon: A recognized principle or rule, a body of work by an author or composer.
* Canyon: A deep, narrow valley with steep sides.
Sounds like "chorus":
* Core: The central part of something, the most important part.
* Course: A path or direction, a series of lessons or studies.
Sounds like "stuff":
* Stoff: (German) Material, fabric, or substance.
* Snuff: A powdered tobacco that is inhaled through the nose.
Round or Homonyms:
* There are no perfect homonyms for "cannons," "chorus," or "stuff," as they all have unique pronunciations.
Other Possibilities:
* Cannonball: A heavy projectile fired from a cannon.
* Chorale: A hymn or anthem sung by a choir.
* Stuffing: A mixture of ingredients used to fill food.
It's important to consider the context in which you're using these words to choose the best fit.