boojum tree vs Idria columnaris

boojum tree and Idria columnaris both are nouns.

Word	Noun	Adjective	Verb	Adverb
boojum tree	Yes	No	No	No
Idria columnaris	Yes	No	No	No

As nouns, boojum tree and Idria columnaris are synonyms defined as:

boojum tree and Idria columnaris: candlewood of Mexico and southwestern California having tall columnar stems and bearing honey-scented creamy yellow flowers

Other synonyms of boojum tree include cirio, Fouquieria columnaris.

boojum tree (noun)	Idria columnaris (noun)
candlewood of Mexico and southwestern California having tall columnar stems and bearing honey-scented creamy yellow flowers	candlewood of Mexico and southwestern California having tall columnar stems and bearing honey-scented creamy yellow flowers