10 longest words in the world

10. Honorificabilitudinitatibus (27 letters)

9. Antidisestablishmentarianism (28 letters)

8. Floccinaucinihilipilification (29 letters)

7. Pseudopseudohypoparathyroidism (30 letters)

6. Supercalifragilisticexpialidocious (34 letters)

5. Pneumonoultramicroscopicsilicovolcanoconiosis (45 letters)

4. Aequeosalinocalcalinoceraceoaluminosocupreovitriolic (52 letter word) 

3.(171 letters)

2.(1909 letters)

1. Chemical name for Titin (189,819 letters)