diff --git a/autoload/wordy.vim b/autoload/wordy.vim
index 4994892..0f3e842 100644
--- a/autoload/wordy.vim
+++ b/autoload/wordy.vim
@@ -34,13 +34,11 @@ function! wordy#init(...) abort
     let l:src_path = l:data_dir . '/' . l:lang . '/' . l:dict . '.dic'
     if filereadable(l:src_path)
       if has('nvim')
-        let wlist = readfile(l:src_path)
-        let nlist = []
-        for witem in wlist
-          call add(nlist, substitute(witem, '!$', '?', ''))
-        endfor
-        let l:src_path = "/tmp/" . "_wordy_" . l:dict
-        call writefile(nlist, l:src_path)
+        " Dynamically convert SpellBad words into SpellRare words under NeoVim.
+        " See issue 15 for details: https://github.com/reedes/vim-wordy/pull/15
+        let l:rare_dic = map(readfile(l:src_path), "substitute(v:val, '!$', '?', '')")
+        let l:src_path = tempname()
+        call writefile(l:rare_dic, l:src_path)
       endif
       let l:spell_dir = g:wordy_dir . '/spell'
       if !isdirectory(l:spell_dir)
@@ -58,9 +56,6 @@ function! wordy#init(...) abort
       else
         let l:msg = 'Unable to read target: ' . l:dst_path
       endif
-      if has('nvim')
-        call delete(l:src_path)
-      endif
     else
       let l:msg = 'Unable to read source: ' . l:src_path
     endif