Common words:
* with
* mouth
* south
* both
* youth
Less common words:
* sheath
* loth
* wreath
* sooth
* blithe
Technical/Specialized terms:
* berth (nautical)
* growth (biology)
* stealth (military)
* forth (archaic)
* width (mathematics)
Proper nouns:
* Smith (surname)
* Plymouth (town)
* Haworth (town)
Let me know if you'd like more examples or if you have a specific category in mind!