(of a disease etc) that can be treated using surgery

possible

that can happen or be done, or may prove to be correct; that is reasonable or suitable

likely, attainable

(of ideas, suggestions) that can be done or used or put into practice

within the realm of possibility

concerned with the process of doing something and the results; (of a person, character etc) clever at doing and making things; useful

realistic, useful

capable of existing, developing and surviving

reasonable, practicable

that will work; practicable

feasible