lamp shell vs lampshell

lamp shell and lampshell both are nouns.

Word	Noun	Adjective	Verb	Adverb
lamp shell	Yes	No	No	No
lampshell	Yes	No	No	No

As nouns, lamp shell and lampshell are synonyms defined as:

lamp shell and lampshell: marine animal with bivalve shell having a pair of arms bearing tentacles for capturing food; found worldwide

Other synonyms of lamp shell include brachiopod.

lamp shell (noun)	lampshell (noun)
marine animal with bivalve shell having a pair of arms bearing tentacles for capturing food; found worldwide	marine animal with bivalve shell having a pair of arms bearing tentacles for capturing food; found worldwide