Synonyms for Factualness:

n.

reality, real, actuality, fact. factualness (noun)
truth, reality, fact, factuality.
truth (noun)
accuracy, correctness, actuality, authenticity, genuineness, veracity.
veracity (noun)
authenticity, genuineness, accuracy, veracity, truth, honesty, correctness.

Other synonyms:

reality. fact, actuality. Other relevant words:
reality, factuality, actuality, fact.