Qenya
lóke
noun. dragon
angulóke
noun. dragon
ango
noun. snake, dragon, snake, dragon, *serpent
lungu
noun. dragon
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!
A noun in The Etymologies of the 1930s glossed “snake” derived from the root ᴹ√ANGWA of the same meaning, with a plural form angwi (Ety/ANGWA). This plural form reappeared in the Quenya Verbal System (QVS) from 1948, but there it was translated “dragons”.
Conceptual Development: A similar form ᴱQ. oqi “snake” appeared in the Qenya Lexicon and Poetic and Mythological Words of Eldarissa of the 1910s as a derivative of the early root ᴱ√OQO “curve, bend” (QL/70).
Neo-Quenya: The word Q. leuca “snake” from The Lord of the Rings appendices is more commonly used for “snake” in Neo-Quenya. I would limit ango to larger snakes, meaning “serpent” in keeping to its use for “dragons” as well.