1. important = crucial (extremely important), significant (amount or effects large enough to be important)
2. common = universal, ubiquitous (if something is ubiquitous, it seems to be every where)
3. abundant = ample (enough and usually extra), plentiful (enough for people's needs and wants)
4. stick = adhere, cling (hold on something tightly)
5. neglect = ignore. (difference: neglect means someone has not paid enough attention to something; ignore means no attention.)