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