When I study any book in the Bible, I usually review relevant aspects including words. In Ecclesiastes, Hebel and Ruach are the main words which relate to vanity , but there are a few others.

This are the lists I put together for my study.

Word other than Hebel and Ruach for Vanity
In Qohelet – Ecclesiastes
בֹּאר   bore  bowr: cistern
Ecclesiastes 12:6 HEB: הַגַּלְגַּ֖ל אֶל־ הַבּֽוֹר׃ NAS: and the wheel at the cistern is crushed;
חָסֵר    khaw-sare’   chaser: to lack, need, be lacking, decrease
Ecclesiastes 4:8 HEB: אֲנִ֣י עָמֵ֗ל וּמְחַסֵּ֤ר אֶת־ נַפְשִׁי֙ NAS: am I laboring and depriving myself
Ecclesiastes 9:8 HEB: רֹאשְׁךָ֥ אַל־ יֶחְסָֽר׃ NAS: and let not oil be lacking on your head.
כַּד   kad    kad: a jar
Ecclesiastes 12:6 HEB: הַזָּהָ֑ב וְתִשָּׁ֤בֶר כַּד֙ עַל־ הַמַּבּ֔וּעַ NAS: is crushed, the pitcher by the well
Not in Ecclesiastes
shav: emptiness, vanity Original Word: שָׁוְא  (shawv)
reqam: emptily, vainly Original Word: רֵיקָם   (ray-kawm’)
naqah: to be empty or clean Original Word: נָקָה  (naw-kaw’)
reyach: savour Original Word: רֵ֫יחַ (ray’-akh)