nephesh (Hebrew #5315)
properly, a breathing creature, i.e. animal of (abstractly) vitality; used very widely in a literal, accommodated or figurative sense (bodily or mental)
KJV usage: any, appetite, beast, body, breath, creature, X dead(-ly), desire, X (dis-)contented, X fish, ghost, + greedy, he, heart(-y), (hath, X jeopardy of) life (X in jeopardy), lust, man, me, mind, mortally, one, own, person, pleasure, (her-, him-, my-, thy-)self, them (your)-selves, + slay, soul, + tablet, they, thing, (X she) will, X would have it.
Pronounce: neh'-fesh
muwth (Hebrew #4191)
causatively, to kill
KJV usage: X at all, X crying, (be) dead (body, man, one), (put to, worthy of) death, destroy(-er), (cause to, be like to, must) die, kill, necro(-mancer), X must needs, slay, X surely, X very suddenly, X in (no) wise.
Pronounce: mooth
Origin: a primitive root: to die (literally or figuratively)