flight vs hejira

flight and hejira both are nouns.

Word	Noun	Adjective	Verb	Adverb
flight	Yes	No	Yes	No
hejira	Yes	No	No	No

As nouns, hejira is a hyponym of flight; that is, hejira is a word with a more specific, narrower meaning than flight:

flight (noun)	hejira (noun)
an instance of traveling by air	a journey by a large group to escape from a hostile environment
the act of escaping physically
a scheduled trip by plane between designated airports
a stairway (set of steps) between one floor or landing and the next
passing above and beyond ordinary bounds
an air force unit smaller than a squadron
a formation of aircraft in flight
a flock of flying birds
the path followed by an object moving through space