killer

One that kills.

Something that is extremely difficult to deal with or withstand.

Causing death or destruction.

Having impressive or effective power or impact; formidable.

Extremely useful or indispensible.

A contrivance for killing large ferocious animals.

The technical name among house-painters for anything used to prevent resin, locally present in woodwork, from exuding and making visible spots on the painted surface; also, in a more general sense, any substance used to remove spots on such surfaces.

One who kills or deprives of life; especially, a slaughterer; a butcher.

A club of hard wood, used for killing fish.—