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
chayah (Hebrew #2421)
to live, whether literally or figuratively; causatively, to revive
KJV usage: keep (leave, make) alive, X certainly, give (promise) life, (let, suffer to) live, nourish up, preserve (alive), quicken, recover, repair, restore (to life), revive, (X God) save (alive, life, lives), X surely, be whole.
Pronounce: khaw-yaw'
Origin: a primitive root (compare 2331, 2421)