lycee vs lyceum

lycee and lyceum both are nouns.

Word	Noun	Adjective	Verb	Adverb
lycee	Yes	No	No	No
lyceum	Yes	No	No	No

As nouns, lycee and lyceum are synonyms defined as:

lycee and lyceum: a school for students intermediate between elementary school and college; usually grades 9 to 12

Other synonyms of lycee include Gymnasium, middle school, secondary school.

lycee (noun)	lyceum (noun)
a school for students intermediate between elementary school and college; usually grades 9 to 12	a public hall for lectures and concerts
	a school for students intermediate between elementary school and college; usually grades 9 to 12