inplane

As adjectives the difference between inplane and interplane

is that inplane is within a plane while interplane is between planes.

As a verb enplane

is to board an airplane.

As an adjective inplane is

within a plane.

As an adverb plane

is (label) particularly, especially, certainly.

As a noun plane

is (label) the thing, the point, the interesting thing, the main interest in something, unusualness, speciality.

As an adjective inplane is

within a plane.