Triskaidekaphobia

18 letters now

telecommunications


Next: 19 letter word

Angiocardiographies

Next: 20 letter word

hydrotherapeutically

Up to a 21-letter word now.

antiauthoritarianisms

Can you believe ... 22-letter word next.

electroencephalography

Try for a 23-letter word.

Nonrepresentationalisms

Now we go for 24-letters.

dichlorodifluoromethanes

Up to 25-letters.

immunoelectrophoretically


Next: 26 letter word

Antidisestablishmentarisms

Is there a 27-letter word?

honorificabilitudini-tatibus was made famous (for some value of "famous") by Shakespeare.

28 letters, there's at least one in English.

Antidisestablishmentarianism (At first I thought this was the same as the previous post I made, but, the "...ian..." near the end accounts for the three extra letters. Didn't realize there were the two words that were so close in spelling. :shrug:

29 letters anyone?

Floccinaucinihilipilification

I know there's a 45-letter word in English, but I don't know if there's at least one word each between where we are now (30 letters), and that.

So, anyway, yeah, 30 letters next.

Sphenopalatineganglioneuralgia (means ice-cream headache or brain freeze)



Next: 31 letters

dziewięćdziesięciokilkuletniemu – a form of "ninety-and-some years old one"

Whew! Next: 32 letters