timolol vs beta-blocking agent

timolol and beta-blocking agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
timolol	Yes	No	No	No
beta-blocking agent	Yes	No	No	No

As nouns, beta-blocking agent is a hypernym of timolol; that is, beta-blocking agent is a word with a broader meaning than timolol:

timolol: a beta blocker (trade name Blocadren) administered after heart attacks
beta-blocking agent: any of various drugs used in treating hypertension or arrhythmia; decreases force and rate of heart contractions by blocking beta-adrenergic receptors of the autonomic nervous system

Other hypernyms of timolol include beta-adrenergic blocker, beta-adrenergic blocking agent, beta blocker.

timolol (noun)	beta-blocking agent (noun)
a beta blocker (trade name Blocadren) administered after heart attacks	any of various drugs used in treating hypertension or arrhythmia; decreases force and rate of heart contractions by blocking beta-adrenergic receptors of the autonomic nervous system