勘違い【かんちがい】
misunderstanding, mistaken idea, wrong guess
勘弁【かんべん】
pardon, forgiveness, forbearance
勘定【かんじょう】
calculation, computation, counting, reckoning, count, bill, check, account, payment (of a bill), settlement (of an account), consideration, allowance
割り勘【わりかん】
splitting the cost, splitting the bill, Dutch treat
勘案【かんあん】
taking into consideration, giving consideration (to)