There are 12 14-letter words that start with 'sy'.
| sycophantishly | syllabications |
| symbolizations | symmetrization |
| sympatholytics | symptomatology |
| synchroneities | synchronically |
| syringomyelias | systematically |
| systematicness | systemizations |
Note: These 12 14-letter words that start with 'sy' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with syn, sym, syl, sys, syr, syc, syp, syb, syz, sye, syk.
3-letter words start with 'sy' (1)