Which is the longest word in English vocabulary???

This is interesting: The longest place name in the world spelled in English is Krungthepmahanakornamornratanakosinmahintarayutthayamahadilokphopnopparatrajathaniburiromudomrajaniwesmahasatharnamornphimarnavatarnsathitsakkattiyavisanukamprasit in Thailand, although it is more commonly known as Bangkok. Lol, I never knew that.

it used to be SUPER­CALI­FRAGI­LISTIC­EXPI­ALI­DOCIOUS, but with the medical terms nowadays, there could be longer words like PNEUMONO­ULTRA­MICRO­SCOPIC­SILICO­VOLCANO­CONIOSIS (also spelled PNEUMONO­ULTRA­MICRO­SCOPIC­SILICO­VOLCANO­KONIOSIS) = a lung disease caused by breathing in particles of siliceous volcanic dust. yes, i looked it up :)