位冠[ikan] ancient headgear showing rank
衣冠[ikan] kimono and ancient head-dress
栄冠[eikan] laurels
王冠[oukan] crown
加冠[kakan] crowning a boy with a traditional cap for the first time at a coming-of-age ceremony

花冠[kakan] corolla (of flower)
冠を曲げる[kanmuriwomageru] to become displeased
冠位[kani] system indicating court ranks by headgear colors (colours)
冠婚葬祭[kankonsousai] important ceremonial occasions in family relationships
冠詞[kanshi] article

戴きます[itadakimasu] expression of gratitude before meals
戴冠式[taikanshiki] coronation ceremony
戴き[itadaki] crown (of head)
戴き物[itadakimono] (received) present
頂戴[choudai] receiving

不倶戴天[fugutaiten] cannot allow (oneself) to live (with someone) under the canopy of heaven
奉戴[houtai] having a prince for a president
戴く[itadaku] to receive
推戴[suitai] (being) presided over by
戴ける[itadakeru] to receive (potential)