Nawsome To Awesome

Ganching (gently) recently reproached me for my use of the word 'awesome'. She suggested that some people might think I was trying to 'sound young'. I took this on board and decided to consult a 'young person'.

Kermie, my sister says that I should reconsider my use of the expression 'awesome'. She feels that it is not age-appropriate. What words do you think a person in her mid-fifties should use when she wishes to suggest 'awsomeness'?

He thought carefully. He answered,

Spiffing? Splendid?

I think he's got it. Thanks Kerm.