Doug this is the best I can do, probably better to ask Google for an explanation.
An airport is an aerodrome with extended facilities, mostly for commercial air transport.[1][2] Airports often have facilities to store and maintain aircraft, and a control tower. An airport consists of a landing area, which comprises an aerially accessible open space including at least one operationally active surface such as a runway for a plane to take off[3] or a helipad,[4] and often includes adjacent utility buildings such as control towers, hangars[5] and terminals. Larger airports may have fixed-base operator services, airport aprons, taxiway bridges, air traffic control centres, passenger facilities such as restaurants and lounges, and emergency services.
An aerodrome (Commonwealth English) or airdrome (American English) is a location from which aircraft flight operations take place, regardless of whether they involve air cargo, passengers, or neither. Aerodromes include small general aviation airfields, large commercial airports, and military airbases.
The term airport may imply a certain stature (having satisfied certain certification criteria or regulatory requirements) that an aerodrome may not have achieved. This means that all airports are aerodromes, but not all aerodromes are airports. Usage of the term "aerodrome" remains more common in the UK, Ireland and Commonwealth nations; in American English it is only used for a facility specialized in antique or ultralight aircraft.[