Words with "aw":
* awful
* award
* awaken
* awkward
* awning
* awful
* awash
* awesome
* awfully
* draw
* claw
* saw
Words with "au":
* autumn
* author
* audience
* august
* audible
* automatic
* authority
* because
* cause
* laugh
* taught
* caught
* daughter
This is just a small sample. There are many more words that contain these digraphs!