Synonyms for Impalpability:

n.

attribute (noun)
intangibleness, intangibility.
impalpability (noun)
intangibleness, intangibility.
unsubstantiality (noun)
nonexistence, insignificance, apparition, nullity, intangibility, Ethereality, tenuousness, unreality, phantom, cipher, zero, spectre, vacancy, Nihility, vacuity, emptiness, nothingness, mirage, immateriality.

Other synonyms:

Other relevant words:
intangibleness.