15-Letter Words Start with 'sp'

There are 15 15-letter words that start with 'sp'.

specialisations	specializations
spectrographies	spectroscopists
spermatogeneses	spermatogenesis
spinelessnesses	spinthariscopes
spiritualnesses	splendiferously
splenectomizing	spontaneousness
sporangiophores	spreadabilities
sprightlinesses

Note: These 15 15-letter words that start with 'sp' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words start with spe, spi, spa, spo, spr, spl, spu, sph, spy.

3-letter words start with 'sp' (2)
4-letter words start with 'sp' (22)
5-letter words start with 'sp' (100)
6-letter words start with 'sp' (173)
7-letter words start with 'sp' (255)
8-letter words start with 'sp' (326)
9-letter words start with 'sp' (273)
10-letter words start with 'sp' (199)
11-letter words start with 'sp' (144)
12-letter words start with 'sp' (110)
13-letter words start with 'sp' (62)
14-letter words start with 'sp' (46)
15-letter words start with 'sp' (15)