I just recently switched from bash to zsh, however I miss my Alt+LeftArrowKey and Alt+RightArrowKey to go back and forth a word at a
Though not strictly answering your question, the default binding for forward-word and backward-word are alt-f resp. alt-b.
This works everywhere, does not require you to leave the home row, and has a nice mnemonic property (f=forward, b=back), while also being consistent with ctrl-f and ctrl-b being forward-character and backward-character.
Rip out your arrow keys!