ladanum vs labdanum

ladanum and labdanum both are nouns.

Word	Noun	Adjective	Verb	Adverb
ladanum	Yes	No	No	No
labdanum	Yes	No	No	No

As nouns, ladanum and labdanum are synonyms defined as:

ladanum and labdanum: a soft blackish-brown resinous exudate from various rockroses used in perfumes especially as a fixative

ladanum (noun)	labdanum (noun)
a soft blackish-brown resinous exudate from various rockroses used in perfumes especially as a fixative	a soft blackish-brown resinous exudate from various rockroses used in perfumes especially as a fixative
	a dark brown to greenish oleoresin that has a fragrant odor and is used as a fixative in perfumes; obtained as a juice from certain rockroses