that may be used, seen or obtained

ready for use

having a healthy, helpful, productive etc effect

advantageous

suitable; that avoids trouble or difficulty

appropriate, useful

able to bring about the result intended

productive, persuasive

(not used of a person) bringing about the result required

influential; authoritative

having, designed to have, practical use

working

able to be reached, used, visited etc

ready for use

causing, responsible (for something); of or for musical instrument

influential, assisting

of a value too high to be measured

priceless

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

possible

being used; having an effect; able to be used

active, functioning; influential

(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

bringing profit; giving an advantage; useful

advantageous; money-making

(a person, business etc) not as important, high in position etc as the main person, business etc

secondary, helpful

having a use; helpful

beneficial, valuable

designed for use rather than beauty

practical

of great value, worth or use; very useful

very important; priceless

that is worth the time, trouble etc needed

helpful