Re·li·a·ble
[rəˈlīəb(ə)l]

ADJECTIVE
consistently good in quality or performance; able to be trusted:
"a reliable source of information"

synonyms: dependable · good · well founded · authentic · valid · genuine · sound · true · trustworthy · dependable · good · true · faithful · devoted · steadfast · staunch · constant · loyal · trusty · dedicated · unfailing · truthful · honest · dependable · safe · fail-safe · reputable · dependable · trustworthy · honest · responsible · established · proven
antonyms: untrustworthy · disreputable · UNRELIABLE

NOUN
reliables (plural noun)
a person or thing with trustworthy qualities:
"the supporting cast includes old reliables like Mitchell"