Yes, REIFICATION is a Scrabble word!

Letter values in Scrabble US: R 1, E 1, I 1, F 4, I 1, C 3, A 1, T 1, I 1, O 1, N 1.

Is it a valid word?

REIFICATION is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

regarding something abstract as a material thing
representing a human being as a physical thing deprived of personal qualities or individuality

Also: depersonalization, depersonalisation.

Not playable in Scrabble US: HYPOSTATISATION.