隠忍[innin] patience
押っ忍[osu] greeting used between close male friends
勘忍[kannin] pardon
堪忍袋の緒が切れる[kanninbukuronoogakireru] to be out of patience
堅忍[kennin] perseverance

堅忍不抜[kenninfubatsu] indomitable perseverance
残忍[zannin] cruelty
恥を忍ぶ[hajiwoshinobu] to abide one's shame
忍ばせる[shinobaseru] to conceal
忍び[shinobi] stealth