gnarl
Gnarl is "a rough, knotty protuberance, especially on a tree".
Snarl
Carl
The term 'snarl' means to growl or to speak viciously or angrily. It is a facial expression one may have when he or she is angry. The term 'snarl' also means a knot or mess.
gnarl
It could gnarl.
If by "snarl" you mean "knot" then I suggest you massage it out using water and a natural oil, such as extra virgin coconut oil or extra virgin olive oil.
Yes, cot and knot are rhyming words.
cot dot knot not got :)
knot
curl
The tree that rhymes with "three" is a birch tree.