This

Pronoun

  means

Verb

  that

Subordinating conjunction

  all

Determiner

  airports

Noun

  are

Auxiliary

  aerodromes

Noun

,  but

Coordinating conjunction

  not

🚫

Particle

  all

Determiner

  aerodromes

Noun

  are

Auxiliary

  airports

Noun

.

This means that all airports are aerodromes, but not all aerodromes are airports.

This means that all airports are aerodromes, but not all aerodromes are airports.