Imagine you want to say something like 'Men' are always inside 'Women'... and you want to add something like, character-wise or alphabetically speaking. How do you go about it? The problem with character-wise is, character is already associated with a person's character.
The idiomatic way of saying this is,
You can't spell women without men.
Marge: A dishonorable discharge. It's the best we could've hoped for!
Homer: You can't spell 'dishonorable' without 'honorable'!
Trying to shoehorn this into an adjective is reinventing the wheel, and getting a square wheel.
I think alphanumeric can be used, too.
If I was being formal I would say
'Men' are always inside 'Women' ... orthographically.
Less formally, I would say
'Men' are always inside 'Women' ... spelling-wise.