Userform:Search through all ws / show results in Listbox

Hello everyone,
I have very large wordlist ( 0.5 Million Rows, 11 columns, words only in column A) and would like to search through all worksheets of it with the help of a Userform (containing one textbox for words to be searched and a listbox for the results). When I type a word in the textbox and then click on the button search, i want a list of all found results in the listbox.

I will be thankful for each kind of help.