A word appearing as G. corob “a skull” in the Gnomish Lexicon of the 1910s (GL/26), likely related to ᴱ√KORO “be round” (QL/48).
Neo-Sindarin: Since √KOR “round” survived in Tolkien’s later conception of the languages, I’d retain this word as ᴺS. corob “skull”, especially since other early “skull” words such as ᴱN. cas derived from ᴱ√KASA “head” were probably no longer viable since non-initial s generally vanished in Sindarin.
A noun in the Gnomish Lexicon of the 1910s glossed “a throw, a cast”, as well as “a turn, move, go, etc. in games and so on” (GL/48), clearly based on the early root ᴱ√HATA (GL/48).
Neo-Sindarin: Since the similar root ᴹ√KHAT “hurl” survived in Tolkien’s later writings, I would retain the noun ᴺS. hant “throw, cast” for purposes of Neo-Sindarin, with the extended meaning “turn or move in games”.