There are 6 13-letter words that start with 'ur'.
| uranographies | urbanisations |
| urbanizations | urbanologists |
| urediniospore | urethroscopes |
Note: These 6 13-letter words that start with 'ur' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with ure, ura, uro, urb, uri, urt, urg, urs, urp, uru, urc, urn, urd.
3-letter words start with 'ur' (4)