Quettaparma Quenyallo

osta (2) noun "homestead" (LT2:336)

ostar noun "township" (LT2:336)

ostimë (pl. ostimi is attested) noun "blend", in linguistics a term for a kind of "strengthened" elements within a stem, where a single sound has been expanded into two different elements while maintaining a unitary effect and significance: such as s- being turned into st-, or m being strengthened to mb. (VT39:9)

ostirion noun “fort” (TI:423)

osto (1) noun "a strong or fortified building or place, strong place, fortress" (MR:350, 471; WJ:414); "city, town with wall round" (OS, VT46:8)

osto (2) noun "the gates of the Sun" (LT1:264; this "Qenya" word was probably obsoleted by # 1 above)

Ostoher noun masc. name, *"City-lord" (Appendix A)

oswë noun "hip" (QL:71). If this “Qenya” word is used in Tolkien’s later Quenya (and no other term for “hip” seems available), one would have to assume that the s represents older þ (or it would have become z > r).