Something like this i assume?
This will match for strings those start with "word" then followed by AT LEAST one space and then AT LEAST one number.
Regex reg = new Regex("word\\s+[0-9]+");
You can remove +'s if you only need one space or one number and that is a must. You can use *'s instead of +'s if you want them to occur zero or more times.
Regards,
Anıl Yıldız.