Capable of being relied on; dependable: a reliable assistant; a reliable car.
Yielding the same or compatible results in different clinical experiments or statistical trials.
derivatives
re·lía·biĺi·ty
noun
re·lía·bly
adverb
synonyms:
reliable, dependable, responsible, trustworthy, trusty These adjectives mean worthy of reliance or trust: a reliable source of information; a dependable worker; a responsible babysitter; a trustworthy report; a trusty alarm.
The American Heritage® Dictionary of the English Language, Fourth Edition