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.
morn
adjective. dark, black
maudri
noun. early morn before dawn, time before first meal
morth
noun. darkness
colw
adjective. black
aithl
noun. spring
aithyl
noun. spring
am(b)ros(t)
noun. dawn
amrost
noun. dawn
aurost
noun. dawn
fui
noun. night
hairen
feminine name. Spring
haurost
noun. dawn
tuil
noun. spring
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.