I have 9, but it's kind of trivial. Maybe someone can help add to it?

doux: Sweet, describing wine
doo: Poop, as in "doo-doo"
dew: Condensation
due: Owed
do: Take action
do: Musical note
dough: Bread material
d'oh: Interjection
doe: Female deer

I have 9, with two distinct pronunciations. I'm using a general American pronunciation.

doux: /du/. Sweet, describing wine
doo: /du/. Poop, as in "doo-doo"
dew: /du/. Condensation
due: /du/. Owed
do: /du/. Take action
do: /doʊ/. Musical note
dough: /doʊ/. Bread material
d'oh: /doʊ/. Interjection. Both /doʊ/ and /doʊʔ/ are common pronunciations - both can be heard in this compilation of Homer Simpson.
doe: /doʊ/. Female deer