Top Ten Hardest English Words to Pronounce

The Top Ten

1 Methionylthreonylthreonylglutaminylarginyltyrosylglutamylserylleucylphenylalanylalanylglutaminylleuc yllysylglutamylarginyllysylglutamylglycylalanylphenylalanylvalylprolylphenylalanylvalylthreonylleucylgl ycylaspartylprolylglycylisoleucylglutamylglutaminy

Is this seriously a word... Or is someone goofing off...

So long that it can't even fit in this space.

Is that a real word? - Elina

Believe it or not, this is a real word. - JamesBourne

2 The Full Name of the Protein Titin

This word has 189,819 letters. Look it up if you're curious because it's way too long. laugh out loud

There is a video on YouTube of someone pronouncing it and it took 45 minutes! This should be number 1, it's so much harder to pronounce than otolaryngology or deterioration.

Oh my! That word has 189,819 words. I researched it up and it takes 3 and a half hours to pronounce. - cosmo

There is a pdf online of every letter of the word. It's 72 pages long. It's a book

3 Otolaryngology

The hardest word to pronounce ever!

AHHH! So hard to say! But I still trying it. - rico

It comes from the Greek word otolaryngologos.

Mine turned to otrolorlyngologngy

4 Pneumonoultramicroscopicsilicovolcanoconiosis

This is lower than deterioration? - ---ChargedZircon---

Not even going to try - BreakFastBeast2005

I can't pronounce this crazy wordd!

5 Deterioration



6 Miscellaneous

This word shouldn't even be included in the top ten.

Part of this list seems wrong.

Not so hard! - Sugarcubecorner

This one is easy for me: Mish-uh-lay-nee-iss. But I used to have trouble pronouncing it. - cosmo

7 Supercalifragilisticexpialidocious

I grew up on the run so it was just Mary pooping and wizard of ox so I can say this word easily

For me this is not hard because I'm so used to this word.

Errgh! I always mispronounce this stupid franking word. - NerdyPweeps

That's not a real word- Kevinsidis

8 Onomatopoeia

I had this word for a spelling word before! It is hard to pronounce, but I spelled it right! - funnyuser

We say this all the time in ela so it's not that hard - Thatgirl

9 Refrigerator
10 Susceptible

The Contenders

11 floccinaucinihilipilification

This word literally means to estimate something as being useless.
Yep, this word's useless alright. - Rocko

12 Verisimilitude - the appearance of truth
13 Prioritize
14 Infinitesimal - infinitely small
15 Acrimonious - full of spite or bitter
16 Philanthropy - being in love of mankind, especially by doing good deeds
17 Catastrophe
18 Dilemma

Wow saying this word is a dilemma!

19 Incorrigible - incapable of being reformed
20 Clandestine - Sneaky
21 Mediterranean

Med / I /rr/anian

22 Extraterrestrial
23 Arbitrary - Capricious or Random
24 Renaissance - a rebirth or revival (For Europe between the fourteenth and seventeenth centuries)
25 Hippopotamus The common hippopotamus, or hippo, is a large, mostly herbivorous mammal in sub-Saharan Africa, and one of only two extant species in the family Hippopotamidae, the other being the pygmy hippopotamus.

Hip-po-po-tam-us it's easy - Wobblygaming7

26 World

This is ridiculous, world isn't hard to pronounce at all

It might take a while before successfully pronouncing that word.

Errgh! I can't pronounce this sick and crazy 1-syllable word. It seems like one of the hardest 1-syllable words ever.

AHHH, ERRGH! I usually have a hard time pronouncing that word.

27 This

*gasp* SO HARD...


28 Sixth

Very difficult.

This is the harvest Word Ever you thought. This isn’t Pronounced siks or sikst the th sound is the one to make the word hard to pronounce and the thing there is the x and the th

29 Rural


30 Maths
31 Ship
32 Conciliatory - Making Peace
33 Hexacosichoron
34 Rhombicosidodecahedron
35 Neanderthal
36 Magician
37 Regularly
38 Specific

I always mispronounce this word! - funnyuser

39 Variety
40 Vizio
41 Porifera - Sponge but in a scientific version
42 Pnictogen
43 Whisked
44 Pseudopseudohypoparathyroidism (PPHP)

The meaning of this word is: An inherited disorder

45 Hippopotomonstrosesquipedalian
46 Arachibutyrophobia
47 Defibrillation
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