下血[geketsu] bloody bowel discharge
壊血病[kaiketsubyou] scurvy
吸血[kyuuketsu] bloodsucking
吸血鬼[kyuuketsuki] vampire
給血[kyuuketsu] donation of blood

供血者[kyouketsusha] blood donor
凝血[gyouketsu] blood clot
血の巡りが悪い[chinomegurigawarui] dim-witted
血の巡りの悪い[chinomegurinowarui] dim-witted

御返し[okaeshi] return gift
ごった返す[gottagaesu] to be in confusion or commotion
引返す[hikikaesu] to repeat
引繰り返る[hikkurikaeru] to be overturned
往き返り[yukikaeri] round trip

往返[ouhen] round trip
押返す[oshikaesu] to force back
恩を仇で返す[onwoadadekaesu] to return evil for good
恩返し[ongaeshi] requital of a favour (favor)
割り返し[warikaeshi] rebate