killer

As a noun killer

is an ink eradicator or killer can be a paid killer, a contract killer.

As nouns the difference between buster and killer

is that buster is (a specific instance of) buster : guy, dude, fella, mack, buddy, loser while killer is an ink eradicator or killer can be a paid killer, a contract killer.

As a proper noun buster

is or buster can be (male).

As nouns the difference between killer and kindle

is that killer is an ink eradicator or killer can be a paid killer, a contract killer while kindle is (obsolete) a group of kittens.

As a verb kindle is

to start (a fire) or light (a torch, a match, coals, etc).

As a noun killer is

an ink eradicator or killer can be a paid killer, a contract killer.

As nouns the difference between killer and book

is that killer is an ink eradicator or killer can be a paid killer, a contract killer while book is book.

As nouns the difference between abbreviation and killer

is that abbreviation is the result of shortening or reducing; abridgment while killer is an ink eradicator or killer can be a paid killer, a contract killer.

As a noun killer

is an ink eradicator or killer can be a paid killer, a contract killer.

As a proper noun queen is

a title given to queens.

As a noun killer

is an ink eradicator or killer can be a paid killer, a contract killer.

As an adjective undefined is

lacking a definition or value.