1.) calardan (lampwright)
2.) ceber (stake)
3.) dûr (dark)
4.) adan (man)
5.) mellon (friend)
6.) falas (shore)
7.) gwathel (sister/associate)
8.) hen (eye)
9.) laden (open/cleared)
10.) mithren (grey)
11.) narn (tale)
12.) orn (tree)
13.) onod (ent)
14.) perian (hafling)
15.) thoron (eagle)
16.) talaf (floor)
17.) muindor (brother)
18.) adanadar (one of the "fathers of men")
19.) tulus (poplar tree)
20.) brethil (birch tree)Notes:Remember to distinguish between final and non-final syllables when making plurals.

Extra practice? Join in the Plurals Activity at the Elvish 101 forum!