Ambiguous spelling of extended vowel sound

It seems common practice in informal written English (and possibly other languages) to represent emphasised, slow or drawn-out speech by repeating vowels in words:

I was sooooo drunk

How could a writer avoid ambiguity between a vowel sound that is extended in this way and another word that differs only because it already contains a repeated vowel?

For example, the word god, when extended by repeating the O, could easily be confused with the word good.

Is there a better way of representing long vowel sounds than repeating letters?

Solution 1:

As you're talking about informal speech/writing, you could use alternative informal spellings as well. In this case, you could use gawd.

informal
God (used for emphasis or to express surprise, anger, etc.)
‘Oh Gawd! I'd completely forgotten about it’
Oxford

So you could say, "Oh gaaaawd!"