invitation --- invite
decision---decide
compute---compute
sale---sale
visit---visit
performance---perform
education---educate
developement---develop
mixture---mix
discussion---disscuss

friend---friendly
happiness---happy
difference--different
danger---dangerous
use---useful
noise---noisy
care---careful
nation---national
north---northern
center---central

1 National
2 dangerous
3 useful
4 friendly
5 education
6 north
7 invite
8 noisy
9 mix
10 difference