I think it might be waste / waist
a homonym for muscle the muscle in our body.
A homonym for knows is nose. Another homonym is noes. The nose is a body part, noes is the plural of no and knows is the conjugation of the verb, to know. Knows and nose have the same pronunciation, but different spelling.
The homonym of "feet" is "feat". "Feet" refers to the plural of foot (body part), while "feat" refers to a remarkable achievement or accomplishment.
The homonym for "quietness" is "piece".
TAIL = TALE ( as in a 'tall tale' or story )
Homonyms have the same spelling different meaning. Chest is a homonym that can mean either the part of the body, or a box for keepsakes.
Not every word has a homophone and homophones cannot be 'made up'. Quietness and part don't have a homophone.
The homonym for "useless" is "yous less," which sounds the same but has a different spelling and meaning. The homonym for "blood vessel" is "flood vessel," which also sounds the same but has a different spelling and refers to a vessel that carries fluids other than blood. Homonyms are words that sound the same but have different meanings and spellings.
root as in the part of a plant that is underground
Actually "their" is a homophone for "there". Homonyms must have the same spelling and pronunciation but different meanings. An example is palm - part of you hand or a tree.There is no homonym for there.
Hmm... speakers with British accents may say flaw and floor closely enough to be considered homonyms.
The homonym for "lock a dock" is "loch ado." This refers to a Scottish term for a body of water similar to a lake.