基盤【きばん】
foundation, basis, base, footing, infrastructure, bedrock, substrate (circuit board)
地盤【じばん】
ground, crust (earth), bed (gravel, river, etc.), foundation (building, etc.), base, constituency, power base, support (electoral), footing, foothold
円盤【えんばん】
disk, discus, platter, flying saucer, disc media (CD, DVD, etc.)
碁盤【ごばん】
Go board
羅針盤【らしんばん】
compass
胎盤【たいばん】
placenta