cast-iron plant vs bar-room plant

cast-iron plant and bar-room plant both are nouns.

Word	Noun	Adjective	Verb	Adverb
cast-iron plant	Yes	No	No	No
bar-room plant	Yes	No	No	No

As nouns, cast-iron plant and bar-room plant are synonyms defined as:

cast-iron plant and bar-room plant: evergreen perennial with large handsome basal leaves; grown primarily as a foliage houseplant

Other synonyms of cast-iron plant include aspidistra, Aspidistra elatio.

cast-iron plant (noun)	bar-room plant (noun)
evergreen perennial with large handsome basal leaves; grown primarily as a foliage houseplant	evergreen perennial with large handsome basal leaves; grown primarily as a foliage houseplant