secondary school vs lycee

secondary school and lycee both are nouns.

Word	Noun	Adjective	Verb	Adverb
secondary school	Yes	No	No	No
lycee	Yes	No	No	No

As nouns, secondary school and lycee are synonyms defined as:

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

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

secondary school (noun)	lycee (noun)
a school for students intermediate between elementary school and college; usually grades 9 to 12	a school for students intermediate between elementary school and college; usually grades 9 to 12