infallible
- adjective (adj)
Meaning: unerring, dependable
Synonyms:
acceptable
accurate
agreeable
apodictic
authoritative
certain
correct
effective
effectual
efficacious
efficient
exact
faultless
flawless
foolproof
handy
helpful
impeccable
incontrovertible
inerrable
inerrant
omniscient
perfect
positive
reliable
satisfactory
satisfying
sure
surefire
true
trustworthy
unbeatable
undeceivable
unfailing
unimpeachable
unquestionable
useful
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.