pencil cedar tree vs pencil cedar

pencil cedar tree and pencil cedar both are nouns.

Word	Noun	Adjective	Verb	Adverb
pencil cedar tree	Yes	No	No	No
pencil cedar	Yes	No	No	No

As nouns, pencil cedar tree and pencil cedar are synonyms defined as:

pencil cedar tree and pencil cedar: any of several junipers with wood suitable for making pencils

pencil cedar tree (noun)	pencil cedar (noun)
any of several junipers with wood suitable for making pencils	any of several junipers with wood suitable for making pencils
	wood of a pencil cedar tree; used for making pencils