Do you use the American spelling? A lot of people seem to these days.
More than once on here I have been laughed at for using "sceptic", by people who didn't known the difference between sceptic and septic.
Other hideous Americanisms which it seems to be acceptable to use in British English now:
- "sulfur"
- the date with no "the" and no ordinal (i.e. "Monday Twenty-three June")
- "24/7"
- "so" in the "Chandler from Friends" way, e.g. "I am so not getting this."