御田[oden] oden
塩田[enden] saltpan
凹田[kubota] rice field in a low place
下田[geden] worn-out rice land
我田引水[gadeninsui] seeking one's own interests

刈田[karita] harvested rice field
乾田[kanden] dry paddy field
桑田[souden] mulberry plantation
秋田県[akitaken] Akita prefecture (Tohoku area)
上田[jouden] high rice field

緩衝[kanshou] buffered
緩衝器[kanshouki] shock absorber
緩衝地帯[kanshouchitai] buffer zone
刺衝[shishou] stabbing
衝撃[shougeki] shock

衝撃波[shougekiha] shock wave
衝動[shoudou] impulse
衝動行為[shoudoukoui] shock action
衝動買い[shoudougai] impulsive buying
衝突[shoutotsu] collision

月と鼈[tsukitosuppon] like chalk and cheese (superficially similar, but completely different) (the moon and a turtle shell are both round, but they are otherwise completely different)
鼈甲[bekkou] tortoiseshell (of the hawksbill turtle)
鼈甲色[bekkouiro] amber (colour, color)
石鼈[hizaragai] chiton (any marine mollusk of the class Polyplacophora)
鼈甲蜂[bekkoubachi] spider wasp

田鼈[tagame] Lethocerus deyrollei (species of giant water bug)
鼈茸[suppontake] common stinkhorn (Phallus impudicus)
鼈甲細工[bekkouzaiku] article of tortoise shell
鼈甲飴[bekkouame] hard candy