湖沼[koshou] lakes and marshes
沼沢[shoutaku] marsh
沼地[numachi] marshland
ドロ沼[doronuma] bog
沼田[numata] marshy rice field or paddy

沼気[shouki] marsh gas
沼湖[shouko] marshes and lakes
池沼[chishou] ponds and swamps
沼杉[numasugi] bald Cypress (Taxodium distichum)

萩原[hagihara] reedy field
萩属[hagizoku] Lespedeza (genus comprising the bush clovers)
御萩[ohagi] rice ball coated with sweetened red beans, soybean flour or sesame
山萩[yamahagi] shrubby lespedeza (species of bush clover, Lespedeza bicolor)
宮城野萩[miyaginohagi] Thunberg's lespedeza (species of bush clover, Lespedeza thunbergii)

木萩[kihagi] Lespedeza buergeri (species of bush clover)
丸葉萩[marubahagi] leafy lespedeza (species of bush clover, Lespedeza cyrtobotrya)
溝萩[mizohagi] Lythrum anceps (species of loosestrife closely related to purple loosestrife, Lythrum salicaria)
沼萩[numahagi] Lysimachia fortunei (species of loosestrife)