English word warhead comes from English hot, English head

Detailed word origin of warhead

Dictionary entry	Language	Definition
hot	English (eng)	(incomparable) Electrically charged.. (informal) Radioactive. [from the 20thc.]. (informal) Very good, remarkable, exciting. [from the 19thc.]. (of a person or animal) Feeling the sensation of heat, especially to the point of discomfort.. (of a temper) Easily provoked to anger.. (of an object) Having a high temperature.. (of food) Spicy.. (of the weather) Causing the air to be hot.. (slang) [...]
head	English (eng)	(fishing) To remove the head from a fish.. (intransitive) To form a head.. (intransitive) To move in a specified direction.. (intransitive) To originate; to spring; to have its course, as a river.. (obsolete) To behead; to decapitate.. (transitive) To be in command of. (See also head up.). (transitive) To strike with the head; as in soccer, to head the ball. To cut off the top of; to lop [...]
warhead	English (eng)	The part of a missile, projectile, torpedo, rocket, or other munition which contains either the nuclear or thermonuclear system, high explosive system, chemical or biological agents, or inert materials intended to inflict damage.