以東[itou] ... and eastward
関東[kantou] Kantou (eastern half of Japan, including Tokyo)
関東弁[kantouben] Kantou dialect
極東[kyokutou] Far East
近東[kintou] Near East

古今東西[kokontouzai] all times and places
広東[kanton] Guangdong (China)
広東語[kantongo] Cantonese
至東京[itarutoukyou] leading to Tokyo
真東[mahigashi] due east

血清[kessei] serum
粛清[shukusei] (political) purge
真清水[mashimizu] pure water
清ます[sumasu] to clear
清む[sumu] to clear (e.g. weather)

清い[kiyoi] clear
清まる[kiyomaru] to be purified
清め[kiyome] purification
清める[kiyomeru] to purify
清らか[kiyoraka] clean