湧き出す[wakidasu] to gush out
湧き上る[wakiagaru] to boil up
湧き起る[wakiokoru] to well up
湧き出る[wakideru] to gush forth
湧く[waku] to well (up)

降って湧く[futtewaku] to happen suddenly
湧出[yuushutsu] gushing out
湧き水[wakimizu] spring water
湧出量[yuushutsuryou] output
湧水[yuusui] spring

以降[ikou] on and after
引き降ろす[hikiorosu] to haul down
雨降って地固まる[amefuttejikatamaru] adversity strengthens the foundations
横降り[yokoburi] driving rain
降す[kudasu] to make (a decision)

降立つ[oritatsu] to go down and stand
降る[kudaru] to descend
降ろし[oroshi] dropping
下降[kakou] downward
下降線[kakousen] downward curve