諧和 （カイワ） gentle mutual affection, harmony, harmony

諧謔 （カイギャク） joke, jest, banter

俳諧 （ハイカイ） haikai, collective name for haiku, haibun, haiga, senryū, etc., humorous or vulgar renga poetry

天狗俳諧 （テングハイカイ） parlour game in which three people each write one line of a 5-7-5 poem (without seeing the other lines; often producing humorous results), tengu haiku