Big Words :]?

.Acquiescence- passive consent

Amalgamate- Mix together

Ambidextrous- Using both hands with ease (comfortable with both hands not just right or left)

Anachronism- Occuring not in proper time

for more :

http://www.freevocabulary.com/

For the longest word (45 letters) go here:

http://members.aol.com/gulfhigh2/words11.html

2nd longest:

HEPATICO­CHOLANGIO­CHOLECYST

­ENTERO­STOMIES

It means a surgical creation of a connection between the gall bladder and a hepatic duct and between the intestine and the gall bladder.

3rd longest: (made up) song title

SUPER­CALI­FRAGI­LISTIC­EXPI­ALI

­DOCIOUS

(for some reason its in the oxford dictionary

pneumonultramicroscopic

silicovolcanokoniosis

had to split the word otherwise it wouldnt show up.

its a lung disease by inhaling silica dust

electroencephaligram - (i think i spelled it wrong) but i think its some kind of instrument for the brain.