undirstraumur
nafnorð karlkyn
Fallbeygingar
Eintala
eintala með greini
nefnifall
undirstraumur
undirstraumurinn
þolfall
undirstraum
undirstrauminn
þágufall
undirstraumiundirstraum
undirstraumnum
eignarfall
undirstraums
undirstraumsins
Fleirtala
fleirtala með greini
nefnifall
undirstraumar
undirstraumarnir
þolfall
undirstrauma
undirstraumana
þágufall
undirstraumum
undirstraumunum
eignarfall
undirstrauma
undirstraumanna