1) the capacity, skill or power needed to do something physical or mental (ability)

2) that which makes something complete; the full number or quality needed (complement)

3) a person with good judgement on matters in which knowledge or artistic taste is needed (connoisseur)

4) (an instance of) the state of being short of, less than, what is correct or needed (deficiency)

5) to supply a person, oneself, a ship etc (with what is needed for a purpose) (equip)

6) the spending (of money etc); money used of needed (expense)

7) something (unexpected and) welcome because it is needed (godsend)

8) all the equipment (especially clothing) of a soldier, sportsman or traveller; the tools needed by a worker (kit)

9) alive, especially now; a means of keeping alive, of earning what is needed for life (living)

10) the act or state of maintaining or being maintained; a means for providing what is needed to support life (maintenance)