forustuborg
nafnorð kvenkyn
Beyging
eintalafleirtala
án greinismeð greinián greinismeð greini
nf.forustuborgforustuborginnf.forustuborgirforustuborgirnar
þf.forustuborgforustuborginaþf.forustuborgirforustuborgirnar
þgf.forustuborgforustuborginniþgf.forustuborgumforustuborgunum
ef.forustuborgarforustuborgarinnaref.forustuborgaforustuborganna