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.

Qenya 

-nil

suffix. -friend

nil

noun. blue-bell, harebell

A word in the Declension of Nouns of the early 1930s translated as “harebell” (PE21/19) or “blue-bell” (PE21/26), which are different English names for the same kind of flower.

Conceptual Development: In the Qenya Lexicon and Poetic and Mythological Words of Eldarissa of the 1910s, ᴱQ. qille (qilli-) was “bluebell” based on the early root ᴱ√QILI having to do with colours (QL/77; PME/77). These documents also had a more elaborate form ᴱQ. {qillenen >>} qillinin (qillinind-) for “bluebell”, where the second element was probably ᴱQ. nin (nind-) “blue” (QL/66).

Qenya [PE21/19; PE21/26] Group: Eldamo. Published by

-nildo

suffix. -friend

-dil

suffix. -friend

-iel

suffix. -friend

-(n)dil

suffix. -friend

Qenya [Ety/NIL; EtyAC/NIL] Group: Eldamo. Published by

nilmo

noun. friend

-dildo

suffix. -friend

-el

suffix. friend

-ser

suffix. friend

helde

noun. friend

heldo

noun. friend

helmo

noun. friend

kumna

adjective. empty

An adjective for “empty” in The Etymologies of the 1930s under the root ᴹ√KUM “void” (Ety/KUM).

málo

noun. friend

Qenya [Ety/MEL; PE18/046] Group: Eldamo. Published by

proper name. Moon

A name for the moon in linguistic notes from 1930s (PE21/38, 41), perhaps a derivative of the root ᴹ√NDŪ “go down”, though this root usually applied to the Sun. Its dual form Nunt referred to both the sun and moon (PE21/38).

Qenya [PE21/38; PE21/41] Group: Eldamo. Published by

sermo

noun. friend

seron

noun. friend

sondo

noun. friend


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.