Linux command to list all available commands and aliases

Question

Is there a Linux command that will list all available commands and aliases for this terminal session?

As if you typed \'a\' and pressed tab, but for every letter of

Answer 1

You can always to the following:

1. Hold the $PATH environment variable value.
2. Split by ":"
3. For earch entry: 
    ls * $entry 
4. grep your command in that output.

The shell will execute command only if they are listed in the path env var anyway.