Synonyms for Nihility:

n.

nothing, absence. nonexistence (noun)
nil, null, void, naught, meaninglessness, vacuousness, non-subsistence, nonentity, barrenness.
nothingness (noun)
nothing, nonexistence.
unsubstantiality (noun)
apparition, phantom, immateriality, insignificance, nonexistence, vacancy, spectre, intangibility, mirage, nullity, zero, cipher, tenuousness, impalpability, Ethereality, nothingness, unreality, emptiness, vacuity.

Other synonyms:

nothing. Other relevant words:
nothing, absence.