hatchback vs hatchback door

hatchback and hatchback door both are nouns.

Word	Noun	Adjective	Verb	Adverb
hatchback	Yes	No	No	No
hatchback door	Yes	No	No	No

As nouns, hatchback and hatchback door are synonyms defined as:

hatchback and hatchback door: a sloping rear car door that is lifted to open

Other synonyms of hatchback include hatch, liftgate.

hatchback (noun)	hatchback door (noun)
a sloping rear car door that is lifted to open	a sloping rear car door that is lifted to open
a car having a hatchback door