latch vs door latch

latch and door latch both are nouns.

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

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

latch and door latch: spring-loaded doorlock that can only be opened from the outside with a key

latch (noun)	door latch (noun)
catch for fastening a door or gate; a bar that can be lowered or slid into a groove	spring-loaded doorlock that can only be opened from the outside with a key
spring-loaded doorlock that can only be opened from the outside with a key

latch (verb)	door latch (verb)
fasten with a latch