'z' or 's' - I'm confused or confuzed!

The confuse was just to attract attention. I'll just go on using 's's unless it looks 'wrong' as it sometimes does. Point taken about referencing. My computer set to British English but still underlines when I use an 's'. Oh, well, no easy answer to this!
Thanks all

Cs and Zs don't confuse me, it's Cs and Ss. Defence, Defense, Practice, Practise.

So from now on, I may start a new trend and use Practize and Defenze. After all, all those sill LOL cats on facebook say things like 'Can I haz cheezeburger?'.

Verb with an 's', noun with a 'c'- easy to remember ;)

No it's not - not for me! It's my one and only spelling problem.

For a sister, it's 'Said'. She always writes 'Siad'.

Janerowena: I was in my thirties before I even realized that those words had two different spellings! Then I had trouble remembering whether it was the noun that took 'c' and the verb that took 's', or the other way round. I've got over that now, by remembering that a noun is something that you can usually 'c' (see). It works for me!

Thank you! I wish I had thought of that.

Not entirely related but a good way to remember whether stationary or stationery is "e" for envelope.
New to this site. Interesting and amusing!

This annoys me, my internet spell check is US English, hence color instead of colour etc. I have the system set up as British English, but makes no difference. Very annoying.

Eureka -- I have sorted it, I had UK English set as my language in Chrome, but had not tagged it to be used for the spell check.