There are 8 14-letter words that start with 'is'.
| isentropically | isoagglutinins |
| isoalloxazines | isocarboxazids |
| isochromosomes | isomerizations |
| isomorphically | isoproterenols |
Note: These 8 14-letter words that start with 'is' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with iso, isa, isl, iss, isc, ist, ise, isb, isi, ism.
3-letter words start with 'is' (1)