1) (of a person, character, argument etc) convincing, believable (forceful)
2) seeming to be right or believable (plausible)
able to be supported with reasons
tenable
that can be thought of or believed
reasonable, easy to understand
that can be felt or touched; obvious
clear, obvious
that is very likely to happen or to prove correct
likely to happen
that can be defenced successfully; (an office or position) that can be held by a person
reasonable
dependable; reliable
reliable
(of a person) in the habit of telling the truth
accurate, honest