Synonyms for Factual:

adj.

all (adjective)
actual.
authoritative (adjective)
proven.
certain (adjective)
absolute.
informational (adjective)
evidential, informational.
precise (adjective)
accurate.
real (adjective)
sincere, concrete, real, genuine, veritable, honest, solid, tangible, actual, authentic, true, substantial.
real, correct (adjective)
absolute, authentic, actual, veritable, accurate, certain, descriptive, true, genuine, hard.
true (adjective)
certain, absolute, honest, true, gospel, proven, authentic, definite, axiomatic, right, veracious.
truthful (adjective)
candid, frank, ethical, sincere, earnest, honorable, straightforward, honest, trustworthy, truthful.
veracious (adjective)
genuine, authentic, true, ingenuous, honest, accurate, veracious, correct.

n.

firm, undeniable, definitely, realistic. hard. exact (noun)
descriptive.
factual (noun)
concrete, actual, existent, de facto, real, true.

Other synonyms:

definitely, undeniable. firm. hard.