There are 19 4-letter words that start with 'th'.
| thae | than | that | thaw | thee |
| them | then | thew | they | thin |
| thio | thir | this | thou | thro |
| thru | thud | thug | thus | |
Note: These 19 4-letter words that start with 'th' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with the, thr, thi, tha, tho, thu, thy, thw.
3-letter words start with 'th' (3)