От этих слов сделать существительное, глагол и приалагательное own,library,comfortable,change,possible, teach,expense

own (a) - (n) ownership of own, (v) to own

library (n) - (a) library

comfortable (a) - (n) comfortableness or comfortability

change (v) - (a) change or  changeless or changeable, (n) change or changing

possible (a) - (n) possible or possibility

teach (v) - (n) teaching, (a) teachable

expense (n) - (a) expensive

n - noun - сущ.

a - adjective - прилагательное

v - verb - глагол