Common words:
* bag
* flag
* frag (archaic word for "piece" or "fragment")
* lag
* mag (short for "magazine")
* sag
* stag
* tag
Less common words:
* abac (a type of oriental rug)
* adag (a short, memorable saying or proverb)
* berg (a mountain, especially in Norway and Iceland)
* blog (a website that contains an online diary)
* brag
* crag (a steep, rocky cliff)
* dag (a unit of time equal to 24 hours; a day)
* frug (a type of fruit)
* hag (an ugly old woman)
* knag (a projecting knob or hook)
* nag
* plag (a plague or pestilence)
* rag
* slag (the waste product of a smelting process)
* swag (a decorative garland; booty or plunder)
* trag (a tragic person or situation)
* vlag (a flag, especially in Dutch)
Words with a different meaning:
* baggage
* collage
* massage
* voyage
This is not an exhaustive list, but it gives you a good starting point.