There are too many to list.
yes worst is a word
The word 'worst' is an adjective only when followed by a noun: This is the worst storm we've had in years.The word 'worst is an adverb when it modifies a verb: We don't live in the area worst hit by the storm.The word 'worst' is also a noun: We hope for the best but prepare for the worst.
The Abaluhya (Luhya) equivalent for the English word 'worst' is "eshibii".
An antonym for the word 'worst' is 'best'.
you are the worst cook in the world i have the worst headache i have ever had
Xylyl is the worst starting word according to TikTok user Crvlwanek.
Assuming you mean worst as offensive, such word would be up to the digression of the receiver.
The N word
Actually, worster is not a word because nothing can get worster. If its already worst it can't get worster. So clearly worster is NOT a word.
bad, worse, worst