A noun “foam” in the Gnomish Lexicon of the 1910s with variants osp and ospa (GL/63), probably derived from the root ᴱ√Palas (QL/72).
Gnomish
fring
noun. necklace, carcanet
fring na nauglithon
proper name. Necklace of the Dwarves
nauglafring
proper name. Necklace of the Dwarves
flass
noun. sea-marge, surf; foam; margin, ragged margin, fringe
tast
noun. border, fringe
falos
noun. sea-marge, surf, coast, line, beach; margin, fringe, edge
rib
noun. shore; stripe, line; border, fringe
rim
noun. stripe, line; border, fringe
osp(a)
noun. foam
tholos
noun. sea-marge
A noun in the Gnomish Lexicon of the 1910s glossed “sea-marge, surf; foam; margin, ragged margin, fringe” (GL/35), derived from the root ᴱ√fal- which was “connected with ... many words in fl–” (GL/33).