What is your favourite English word?

I like words like tremendous, Peace, Summery, Sumptuous etc

AWSOME 

Gorgeous The word suggests the meaning.

Queenly. :)

conundrum.

cucumber! Sounds good, doesn't it? :)

Lots of them!

Puddle, tulip, posh.. 

Melancholy and condundrum are also great.

Actually, to me they're all fine when pronounced by a native-speaker:)

I like 'scrumptious' and 'quagmire'. 

Wisest.

pneumonia

I wouldn't like to have it but it sounds really good, and I enjoy pronouncing it too)xD