really-truly (adjective) honest-to-God: genuine
Sinonime: absolute,
accurate,
actual,
authentic, authenticated,
bona fide,
certain, certified,
factual, for real, for-sure,
honest, honest-to-goodness,
kosher*,
legit,
legitimate, no buts about it,
official, on the level, on the up-and-up,
positive,
real, real stuff, really-truly,
straight, sure-enough, sure-thing,
true, unquestionable,
valid