theophylline vs bronchodilator

theophylline and bronchodilator both are nouns.

Word	Noun	Adjective	Verb	Adverb
theophylline	Yes	No	No	No
bronchodilator	Yes	No	No	No

As nouns, bronchodilator is a hypernym of theophylline; that is, bronchodilator is a word with a broader meaning than theophylline:

theophylline: a colorless crystalline alkaloid derived from tea leaves or made synthetically; used in medicine as a bronchial dilator
bronchodilator: a drug that relaxes and dilates the bronchial passageways and improves the passages of air into the lungs

theophylline (noun)	bronchodilator (noun)
a colorless crystalline alkaloid derived from tea leaves or made synthetically; used in medicine as a bronchial dilator	a drug that relaxes and dilates the bronchial passageways and improves the passages of air into the lungs