There are 4 14-letter words that start with 'up'.
| upgradeability | uproariousness |
| uprootednesses | upstandingness |
Note: These 4 14-letter words that start with 'up' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with ups, upr, upt, upb, uph, upp, upg, upc, upl, upd, upw, upf, upe, upm, upa, upk, upo.
3-letter words start with 'up' (2)