to tell you the truth
to be truthful
honesty
make a clean breast
to be frank
downright
frank
honestness
cross my heart and hope to die
frankly
verisimilarly
justly
justifiedly
rightly
call
straightface
proverb
plain
shoot someone straight
honest to gods
guilelessness
put the lie to
incorruptibility
overhonestly
put lie to
put to lie
straight and narrow
strait and narrow
give lie to
keep it a buck
even-down
economical with the truth
on my life
on God
I'm not going to lie
uprightness
avower
level with
if I'm honest
candidly
play it straight
confessional
square
balls about
insincere
what do you want, a cookie
blaspheme
affirmative
speak with a forked tongue
open-faced