...is typing a word equivalent to "uttering?"

Most decidedly. In legal parlance, forging a check is called "uttering a false instrument". The legal definition of "utter" is sufficiently broad to cover any form of communication, oral, written, electronic, or even ones which may not yet have been invented.

So, when I typed "rutabaga" and sent it electronically to Mudcat's server I did, in fact, utter the word, which is something I absolutely refuse to do.

If that makes sense to you, I have this Möbius strip that needs to be turned inside out. Wanna lend a hand?