"I’m good", for "I'm fine" (or "Fine, thanks") in response to the question "How are you?"
Store, for shop
Excited, used to be a word for children but adults can be that too now
Cute, for sweet
Smart, for clever (ubiquitous now)
Heads-up (as in "here's a heads-up" which I know for a fact I'd never heard before I went to America, because I asked someone what it meant)
FYI (similarly)
Call, (as in "call me" - we used to say "phone me" or "give me a ring", or even - remember this one? - "give me a tinkle")
Camps, eg short activity courses for children - what on earth did we call them before?
Fixed, for mended
Done, for finished
Mad, for angry
Pharmacy, for chemist
Medication, for medicine (or we used to call them "drugs" a long while ago)
Sick, for ill (has "poorly" completely died out?)
"Sides" on a menu (did we call them "side orders" or "extras"? I can't remember)
Check out, for find out
Anxious, for worried
Butt, for bottom (and of course ass, for arse)
News anchor, for newsreader or newscaster ("newscaster" is rather a nice word, as if giving news is like being a magician, or a fisherman perhaps)
Regular, for normal (and, of course, for medium-sized)
"Could I get?", for "Please may I have?" (I'm normally easy-going about language change, but I do hate this one)
On your team, for in your team
On your street, for in your street
Fill out a form, for fill in a form
Cookies, for biscuits
Power outage, for power cut
Hiring, for recruiting
Round-up, for summary
Not-for-profit, instead of charity, or charitable
Movie, for film (of course we all knew what a movie was, pre-2006, but we didn't use the word)
Shipping & handling, for postage & packaging
Ziploc bag, for freezer bag (yes, I've heard this one used)
File cabinet, for filing cabinet
Klutzy, for clumsy
Raising kids, instead of bringing them up
And as I mentioned recently... Mac 'n' Cheese, for Macaroni Cheese
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