Yes
Deadly is an adjective.
The noun form of the adjective deadly is deadliness.
yes
The odd one out is "deadly", which is an adjective. Examples: a deadly snake [adjective] She looked at me fiercely. [adverb] They looked at me knowingly. [adverb] He put the glass down carefully. [adverb]
The word vorpal is an adjective. It means to be sharp or deadly.
It is not. It is a Latin adjective, mortalis, meaning deadly.
No. Although it ends in -LY as many adverbs do, it is an adjective (tending to cause death).
Great amazing thrilling exhilarating deadly dangerous unwilling ephemeral short long eternal
deadly it is an adjective that means "causes death" example: Hemlock is a fatal poison.
The use of cluster bombs in Iraq was proving to be extremely deadly to the American troops.
deadly it is an adjective that means "causes death" example: Hemlock is a fatal poison.
The adjective grave, as in "grave peril" means incredibly serious, and often dangerous/deadly.