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.
er
adverb/conjunction. only, but, still
er
adverb/adjective. one, only, alone, a single
er-
verb. to remain
salaqintl
noun. violin, (lit.) thrumsqueak-er
salaqíne
noun. violin, (lit.) thrumsqueak-er
apte
adjective. open
An adjective in the Qenya Lexicon of the 1910s glossed “open” under the early root ᴱ√AFA “open, begin” (QL/29).
har-
verb. to remain
hi
pronoun. she; 3rd sg. fem. pronoun
mir
cardinal. one
el
adverb/adjective. one
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.
A verb in the Qenya Lexicon of the 1910s implied by its present erin “remains” and past ēre, both under the early root ᴱ√ERE “remain alone” (QL/36).