- 顧客【こきゃく】 - customer, client, patron 
- 顧問【こもん】 - adviser, advisor, consultant 
- 回顧【かいこ】 - recollecting, reminiscing, looking back, retrospection, review 
- 顧みる【かえりみる】 - to look back on (the past), to reflect on, to reminisce about, to look behind (at), to turn round (and look), to look over one's shoulder, to consider, to concern oneself about, to take notice of, to pay attention to, to take into consideration 
- 回顧録【かいころく】 - memoirs, reminiscences 
- 一顧【いっこ】 - slightest notice, slightest consideration, slightest attention, a little thought, glance