I want to apply word completion on
isearch shell. When I press tab
^I shows up on the shell instead of completing the word and show up a window for suggestions.
=> Is it possible to complete a word on
The question seems unclear. What is "isearch shell"?
You seem to be using
TAB during Isearch and expecting completion against previous search strings (?). If so, the key you want is
TAB), which is bound to
But you say "complete a word", not complete against a previous search pattern, so the question seems quite unclear.
If you are just looking for full-word searching, that's on
M-s w while isearching.