• aboveboard, candid, devout, disarming, downright, expansive, forthright, frank, free-spoken, genuine, heartfelt, hearty, honest, ingenuous, liberal, outright, outspoken, plain, point-blank, round, simple-hearted, sincere, single, solid, straight, straightforward, transparent, true, truthful, undisguised, up front, upfront, wholehearted
• aboveboard, candidly, downright, forthright, forthrightly, genuinely, liberally, outright, plainly, sincerely, straight, true, truly, truthfully
• bluntness, candor, candour, forthrightness, frankness, genuineness, naivety, naiveté, sincereness, sincerity, straightforwardness, straightness
• to speak bluntly, to talk broadly
• to make a clean breast of sg
• to be quite frank, to put in bluntly, to put it bluntly
• wholehearted enthusiasm