ingenuous
upfront
candid
on the square
unsecretive
up front
level with
plain
forthright
squarely
play it straight
ingenuousness
keep it a buck
square
direct
open-hearted
ridgy-didge
honest
overt
man-to-man
open-faced
openly
like a martin to his gourd
single-hearted
dinkum
straight talk
frankly
evendown
on the up-and-up
candor
honestly
wear one's heart on one's sleeve
make no secret of
straight dinkum
square shooter
straight arrow
straight shooter
freedom
fair dinkum
bluffness
honest injun
unscheming
dinky-di
plain-spoken
clear cut
undissimulated
hearts on sleeves
level
truthful
frankheartedness