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.
helin
noun. pansy
helinille
noun. violet
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 word appearing as ᴱQ. helin “pansy” in the Qenya Lexicon and Poetic and Mythological Words of Eldarissa of the 1910s (QL/39; PME/39). It was unrelated to the early root ᴱ√HELE having to do with ice (QL/39).
Neo-Quenya: The root √KHEL remained the basis for ice words in Tolkien’s later writings, but if helin “pansy” could coexist with the earlier form of this root, I think it can coexist with the later form as well. ᴺQ. helin “pansy” is worth keeping for purposes of Neo-Quenya since it is the basis for several words for purple flowers and colours. The word helin and its derivatives might be reconceived as being related to the 1930s root ᴹ√ƷEL “sky”, which had derived words having to do with “(pale) blue”.