needed, necessary

need, necessity

human, person, human being / personality, character / (Buddhism) literally meaning: "human society", referring to one of the six realms of reincarnation in Buddhist cosmology.

(archaic) the world in which people live; the world, society

(dated, rare) a place devoid of people

nature / spontaneity

natural / spontaneous

naturally / spontaneously / rarely / coincidentally

necessity (quality or state of being necessary, unavoidable, or absolutely requisite)

unnecessary