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.
itse
noun. small fly
-itse
suffix. diminutive
-litse
suffix. diminutive
-(l)inta
suffix. diminutive
-(w)inta
suffix. diminutive
-inya
suffix. diminutive
-itsa
suffix. diminutive
-linte
suffix. diminutive
-lla
suffix. diminutive
-lle
suffix. diminutive
-pi(t)
suffix. diminutive
-pin(ke)
suffix. diminutive
-tsa
suffix. diminutive
-íne(a)
suffix. diminutive
kaivo
noun. corpse
mi(e)-
prefix. diminutive
mike-
prefix. diminutive
miki-
prefix. diminutive
qelet
noun. corpse
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.
The word ᴱQ. itse “a small fly” appeared in the Qenya Lexicon of the 1910s derived from the early root ᴱ√ITI “peck, bite (of flies), annoy” (QL/43).
Conceptual Development: A similar (archaic) word ᴹQ. tsette “fly” appeared in notes on The Feanorian Alphabet from the 1940s (PE22/51). This word is questionable given that while ps and ks were listed among valid initial clusters in Quenya, ts was not (PE19/38, 80).
Neo-Quenya: I would retain the Early Qenya word as ᴺQ. itsë “small fly”.