I’ve traditionally used the apropos command to find new commands. But you can also use the compgen command, which looks at the completion matches for given words, to find a list of commands that you can run, simply use compgen with a -c option:
You can parse information for a single command:
compgen -c | grep apropos
You can also use -a for aliases, -b for bash built-ins and -k for bash keys, as well as `-A function` for functions. You can then string ‘em together:
compgen -abckA function
I won’t paste the output but I’ll let you pipe it to grep to compgen like a boss. Enjoy!