lamp chimney vs chimney

lamp chimney and chimney both are nouns.

Word	Noun	Adjective	Verb	Adverb
lamp chimney	Yes	No	No	No
chimney	Yes	No	No	No

As nouns, lamp chimney and chimney are synonyms defined as:

lamp chimney and chimney: a glass flue surrounding the wick of an oil lamp

lamp chimney (noun)	chimney (noun)
a glass flue surrounding the wick of an oil lamp	a vertical flue that provides a path through which smoke from a fire is carried away through the wall or roof of a building
	a glass flue surrounding the wick of an oil lamp