There are 7 14-letter words that start with 'lu'.
| lubberlinesses | lugubriousness |
| lukewarmnesses | luminousnesses |
| lusciousnesses | lustrousnesses |
| luteinizations | |
Note: These 7 14-letter words that start with 'lu' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with lun, lum, lus, luc, lut, lur, lub, lug, lux, lul, lup, luf, lud, luk, lue, lua, luv.
3-letter words start with 'lu' (4)