Hi,
I'm using Linux Mint and Lazarus and most of my programs written in Windows 10
runs without problem on Linux, Sometimes I have to change the Layout or Fonts, but that's all.
If you don't use Direct X, that's O.K.
For LibreOffice Writer, there's a word counter in Tools->Wordcount and a search/replace function in Edit.
But you can try it first in Windows 10 to test its features.
Happy New year.
B->