介添え[kaizoe] helper
寄添う[yorisou] to get close
後添い[nochizoi] one's second wife
食品添加物[shokuhintenkabutsu] food additive
申し添える[moushisoeru] to add to what has been said

添う[sou] to meet (one's expectations, etc.)
添加[tenka] addition
添加剤[tenkazai] addition agent
添加物[tenkabutsu] addition
添削[tensaku] correction

沃度丁幾[youdochinki] tincture of iodine
豊沃[houyoku] fertility
沃素[youso] iodine (I)
肥沃[hiyoku] fertility
沃土[yokudo] rich soil

沃地[yokuchi] fertile land
沃野[yokuya] fertile fields or plain
沃化[youka] iodization
沃野千里[yokuyasenri] vast expansion of fertile land
沃度[youdo] iodine