What is the crossword answer for the clue: Air passage

DUCT - a 4 letter word may be the answer you are looking for!

FLUE - a 4 letter word may be the answer you are looking for!

VENT - a 4 letter word may be the answer you are looking for!

NOSTRIL - a 7 letter word may be the answer you are looking for!

Air passage

4 Character Answers:

DUCT

FLUE

VENT

7 Character Answers:

NOSTRIL