access vs backdoor

access and backdoor both are nouns.

Word	Noun	Adjective	Verb	Adverb
access	Yes	No	Yes	No
backdoor	Yes	No	No	No

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

Other hyponyms of access include back door.

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

access: a code (a series of characters or digits) that must be entered in some way (typed or dialed or spoken) to get the use of something (a telephone line or a computer or a local area network etc.)
backdoor: an undocumented way to get access to a computer system or the data it contains

Other hyponyms of access include back door.

access (noun)	backdoor (noun)
the act of approaching or entering	a secret or underhand means of access (to a place or a position)
a way of entering or leaving	an entrance at the rear of a building
(computer science) the operation of reading or writing stored information	an undocumented way to get access to a computer system or the data it contains
the right to enter
the right to obtain or make use of or take advantage of something (as services or membership)
a code (a series of characters or digits) that must be entered in some way (typed or dialed or spoken) to get the use of something (a telephone line or a computer or a local area network etc.)

access (verb)	backdoor (verb)
reach or gain access to
obtain or retrieve from a storage device; as of information on a computer