sincerest

Strongest matches

• candid
• earnest
• forthright
• genuine
• heartfelt
• outspoken
• real
• serious
• true
• trustworthy

Weak matches

• aboveboard
• actual
• artless
• bona fide
• dead-level
• dear
• devout
• faithful
• frank
• guileless
• honest to God
• like it is
• meant
• natural
• no fooling
• no-nonsense
• on the level
• on the line
• on up and up
• open
• plain
• pretensionless
• regular
• righteous
• saintly
• square
• sure enough
• true-blue
• twenty-four carat
• unaffected
• undesigning
• undissembled
• unfeigned
• unpretentious
• up-front
• wholehearted