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.
olaste
noun. growth
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.
olasta
noun. growth
loa
growth
loa, noun literally "growth", used of a solar year (= coranar) when seasonal changes are considered (Appendix D; in PM:126 loa is translated "time of growth". Pl. loar, or "löar", in MR:426) The form loa is also mentioned as the hypothetical Quenya cognate of Sindarin lô ("swampy"), but precisely because it clashed with loa "year", this Quenya cognate was not in use (VT42:10)
olmië
noun. growth
galas
noun. growth, plant
galas
growth
galas (i **alas) (plant), pl. gelais (i ngelais = i ñelais), coll. pl. galassath**
galas
growth
(i ’alas) (plant), pl. gelais (i ngelais = i ñelais), coll. pl. galassath
A noun appearing as ᴹQ. {alaste >>} olaste “growth” in the Quenya Verbal System (QVS) of 1948 as a combination of {ala- >>} ᴹQ. ola- “grow” with the general action suffix ᴹQ. -ste (PE22/110).
Neo-Quenya: Since Tolkien revised the general action suffix to -sta a few years later, I would update this noun to ᴺQ. olasta “growth” for purposes of Neo-Quenya. I would use this word for “growth” in general, both physical and metaphorical, as opposed to olmië as the period or process of life where one is growing.