[exolymph]

It's not super difficult to spell but given that it's not very commonly used, a little on the difficult side in terms of spelling.

[mvila]

Thanks, exolymph. I thought so. I guess the "i" after "lia" seems a bit weird in English.

[byoung2]

In fact, before now I could have sworn it was spelled "liason"

[verdverm]

You might want to Google that spelling ;]

[mvila]

Interesting! It seems that both spelling are actually used...