15-Letter Words Start with 'so'

There are 16 15-letter words that start with 'so'.

socialistically	sociobiological
sociobiologists	socioculturally
sociohistorical	sociolinguistic
softheartedness	solderabilities
solidifications	solipsistically
solitudinarians	solubilizations
somnambulations	sophisticatedly
sophistications	sorrowfulnesses

Note: These 16 15-letter words that start with 'so' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words start with sol, sou, sor, soc, son, som, sof, sop, soa, sod, soo, sob, sov, sow, sot, soi, soy, soj, sog, sok, soz, sos, soe, sox.

3-letter words start with 'so' (12)
4-letter words start with 'so' (49)
5-letter words start with 'so' (87)
6-letter words start with 'so' (127)
7-letter words start with 'so' (183)
8-letter words start with 'so' (211)
9-letter words start with 'so' (194)
10-letter words start with 'so' (149)
11-letter words start with 'so' (91)
12-letter words start with 'so' (62)
13-letter words start with 'so' (46)
14-letter words start with 'so' (31)
15-letter words start with 'so' (16)