Noldorin
chwann
noun. sponge, fungus
chwann
noun. sponge, fungus
hwann
noun. sponge, fungus
chwand
noun. sponge, fungus
hwand
noun. sponge, fungus
chwann
noun. sponge, fungus
chwann
noun. sponge, fungus
hwann
noun. sponge, fungus
chwand
noun. sponge, fungus
hwand
noun. sponge, fungus
A noun for “sponge, fungus” appearing as N. chwann or hwand in The Etymologies of the 1930s derived from primitive ᴹ✶swanda under the root ᴹ√SWAD (Ety/SWAD). In Noldorin of the 1930s, ancient initial *sw* became voiceless *hw*, and then this *hw* became *chw*.
Neo-Sindarin: Since the change of initial hw to chw did not occur in the Sindarin of 1950s and 60s, I would adopt this word as ᴺS. whand “sponge, fungus”.