focal seizure vs seizure

focal seizure and seizure both are nouns.

Word	Noun	Adjective	Verb	Adverb
focal seizure	Yes	No	No	No
seizure	Yes	No	No	No

As nouns, seizure is a hypernym of focal seizure; that is, seizure is a word with a broader meaning than focal seizure:

focal seizure: transitory disturbance in motor or sensory function resulting from abnormal cortical activity
seizure: a sudden occurrence (or recurrence) of a disease

Other hypernyms of focal seizure include ictus, raptus.

focal seizure (noun)	seizure (noun)
transitory disturbance in motor or sensory function resulting from abnormal cortical activity	the taking possession of something by legal process
	the act of forcibly dispossessing an owner of property
	the act of taking of a person by force
	a sudden occurrence (or recurrence) of a disease