siroče

1. orphan
   Ostao je siroče sa pet godina. — He was orphaned at the age of five.
   Ta organizacija pomaže siročadi iz cele zemlje. — That organization helps orphans from all over the country.

The word is neuter: siroče je ostalo. Its usual plural is the collective 'siročad', which can take plural predicate agreement: siročad su ostala.