Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
niogrim
noun. swarm
niost
noun. hive
A word appearing as G. niost “hive” in the Gnomish Lexicon of the 1910s based on G. nio(s) “bee” (GL/60). The second element might be G. ost “enclosure; town”.
Neo-Sindarin: For purposes of Neo-Sindarin I would adapt this words as ᴺS. níwost “hive”, a combination of ᴺS. nîw “bee” and S. ost “city, town”.
niosturwin
noun. queen bee
nio(s)
noun. bee
nion
noun. grandson
nion
noun. bee
niothluimi
proper name. the Bee of Azure
niwin
noun. female bee
nîn
noun. tear
nien(n)
noun. tear
sion
noun. grandson
A noun appearing as G. sion “grandson” in the Gnomish Lexicon of the 1910s (GL/67), probably related to ᴱQ. yó or yond- “son” in the Qenya Lexicon (QL/106), though where the initial s came from is unclear.
Neo-Sindarin: Since there are no other attested alternatives, I would use ᴺS. sion for “grandson” in Neo-Sindarin, as a now-obscure modification of S. -ion “son”.
A word appearing as niogrim or nigrim “smarm” in the Gnomish Lexicon of the 1910s, a collective form of G. nio “bee” with a suffix G. grim “host” (GL/60). It is not clear why the suffix did not become -rim as in other collective words.
Neo-Sindarin: For purposes of Neo-Sindarin I would adapt this words as ᴺS. niwrim “swarm”, a class plural of ᴺS. nîw “bee”.