Apostrophes

You only need an apostrophe if you have a "missing syllable" where it seems like there SHOULD be another letter, but there isn't, you also use an apostrophe.

For example...

Verbs end with m. Amob'm looks right because it demonstrates the feeling of emptiness or absence of a vowel, because typically /m/ and /b/ do not go directly next to each other so it sounds weird.