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 

lá

adverb. no, not

Qenya [Ety/LA; EtyAC/LA; PE22/119; PE22/120; PE22/122; PE23/074; PE23/078; PE23/099; PE23/103; PE23/104; PE23/107; PE23/111] Group: Eldamo. Published by

la-

prefix. no, none, not any

Qenya [PE23/099; PE23/101; PE23/102; PE23/112] Group: Eldamo. Published by

laiqa

adjective. green

la há

(it is) not that!

Qenya [PE23/078; PE23/104] Group: Eldamo. Published by

anduniesse la mīruvōrion

anduniesse la mīruvōrion

-ula

suffix. verbal adjective (likelihood, aptitude), apt to, likely to do so

Qenya [PE22/097; PE22/111] Group: Eldamo. Published by

kala

noun. light

e·venya ther ar la valya venyate·ko

he heals these others but not can heal him(self)

há la i ni·taltane

thát’s not what I meant (referring to something said)

tyavie la tyazie

(proverb) tasting is not necessarily liking

oia

adverb/adjective. everlasting

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

il-

prefix. no, not

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

lá-

verb. to not be

Qenya [PE22/106; PE22/119; PE22/121; PE22/126; PE22/127] Group: Eldamo. Published by

-ya

suffix. aorist active participle, general verbal adjective

Qenya [PE22/100; PE22/106; PE22/110] Group: Eldamo. Published by

faire

noun. radiance

kalina

adjective. light

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.