Tolkien emended toloth to tolodh, cf. VT/42:31 (and also VT/48:6). If we are to follow him, a word such as tolothen would be incorrect, unless the two forms coexisted
Noldorin
tol-
verb. to come
tol-
verb. to come
tol-na-gaurhoth
place name. Isle of Werewolves
tol-galen
place name. Green Isle
toll
noun. island, (steep) isle rising with sheer sides from the sea or from a river
toloth
cardinal. eight
har-
verb. to stand
toloth
cardinal. eight
A verb appearing as har “stand” on the back of one version of Thror’s Map from the 1930s (AotH/56). It might be related to ᴹQ. thar- “stand” from 1948 (PE22/126).
Neo-Sindarin: Since the later Elvish root for “stand” is √TAR, I would update this verb to ᴺS. tar- as suggested by Elaran.