There are more words but they are from Tolkien's earlier conceptional periods. Tolkien likely changed these words as he evolved the aesthetics and completeness of the languages. You may even find languages that Tolkien later rejected. Do not mix words from different time periods unless you are familiar with the phonetic developments.

Qenya 

nan

adverb/conjunction. but, on the contrary, on the other hand; again

Qenya [Ety/NDAN; LR/072; PE22/124; PE23/109] Group: Eldamo. Published by

nan-

prefix. backwards

nan úye sére indo-ninya símen, ullume

but my heart resteth not here for ever

nan-

verb. to go back, to go back, [ᴺQ.] *retreat, give way, revert, ebb, (lit.) move backwards

tasarinan

place name. Land of Willows

Qenya [TI/417; TII/Tasarinan] Group: Eldamo. Published by

tasse intin nan

there they (are) again

-n(an)

suffix. time

Qenya [PE23/109; PE23/110] Group: Eldamo. Published by

en kárielto eldain isil, hildin úr-anar; toi írimar

for Elves they made the Moon, but for Men the red Sun; which are beautiful

Below: Tolkien's Late Period (1950–1973). These are from Tolkien's late conceptual period — his most settled forms of the languages. Prefer these over the earlier ones above when composing new text.