13-Letter Words Start with 'syn'

There are 15 13-letter words that start with 'syn'.

synaesthesias	synarthrodial
synchromeshes	synchronicity
synchronising	synchronistic
synchronizers	synchronizing
synchronously	synchroscopes
syndactylisms	synecdochical
synecological	syntactically
synthetically

Note: These 15 13-letter words that start with 'syn' are found from the USA & Canada version of the tournament Scrabble word list.

Also see words start with sync, syno, synt, synd, syna, syne, syng, synk, synf, syni, synu.

4-letter words start with 'syn' (2)
5-letter words start with 'syn' (4)
6-letter words start with 'syn' (10)
7-letter words start with 'syn' (22)
8-letter words start with 'syn' (43)
9-letter words start with 'syn' (44)
10-letter words start with 'syn' (44)
11-letter words start with 'syn' (44)
12-letter words start with 'syn' (37)
13-letter words start with 'syn' (15)
14-letter words start with 'syn' (2)
15-letter words start with 'syn' (6)