$$WAY$$   

That is the right way.

This is the way

Ad – Advertisement

Add - As in addition

Air – atmosphere

Heir – one who inherits property

  Bat as in the mammal that is only active at night

Bat in the baseball.

Frame (a surrounding for a picture) 

Frame (falsely incriminate

Cap (the top of a pen or bottle)

Cap (a type of headgear)

   Beat - to strike, overcome

Beat – exhausted or tired

     Cell- compartment 

Sell- vend

$$WING$$     

  One of the bird's wings is broken = parts of a bird for flying 

The hospital is building a new wing = a new part of a building