asambar, asambaro noun "neighbour"; also armaro (VT48:20). Since the ending -o is associated with the masculine gender, the form asambar may be gender-neutral whereas the other forms are gender-marked as masculine.
Sindarin
ahamar
noun. neighbour
ahamar
noun. *neighbor
sammar
neighbour
sammar
noun. *neighbor
samarad
noun. two neighbours
sammar
noun. neighbour
sammar (i hammar, o sammar), pl. semmair (i semmair). Also ahamar (pl. ehemair). Dual samarad, 2 neighbours (VT48:20)