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.

Gnomish

len

adjective. come, arrived

An adjective appearing as G. len “come, arrived” in the Gnomish Lexicon of the 1910s (GL/53), likely based on the early root ᴱ√LEHE “come, be sent, approach” (QL/52). Tolkien said it was “used also with the forms im, on [emphatic pronouns], etc., as a perfect. ‘I have or am come’ as im len, um lenin, etc.”.

Neo-Sindarin: For purposes of Neo-Sindarin, I would instead use the perfective active participle ᴺS. túliel “having come, having arrived”.

len

adverb. wherewith, far, long, away

A rejected adverb in the Gnomish Lexicon of the 1910s glossed “wherewith, far, long, away”, with the first gloss “wherewith” being unclear (GL/53). It was like derived from the early root ᴱ√LENE (QL/53), which was apparently revised to ᴱ√leŋe (GL/53).

glen(n)

adjective. thin, fine, slender

An adjective appearing as glen “slender” in the Gnomish Grammar of the 1910s (GG/11). In the contemporaneous Gnomish Lexicon it appeared as G. {glen >>} glenn “thin, fine” and was related to G. lenc and ᴱQ. léni (GL/39). It was thus derived from the early root ᴱ√LENE “long” as suggested by Christopher Tolkien (QL/53; LT2A/Glend).

Gnomish [GG/11; GL/39; LT2A/Glend] Group: Eldamo. Published by

nôbi i·mab ’len suila ontha

*he took the slender hand of his daughter

im len

I have come or am come

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.