As nouns the difference between highschool and gymnasium
is that highschool is an alternative spelling of lang=en while gymnasium is a large room or building for indoor sports.
highschool
English
Derived terms
* highschoolboy (rare)
* highschoolgirl (rare)
gymnasium
English
Noun
(en-noun)
A large room or building for indoor sports.
A type of secondary school in some European countries which typically prepares students for university.
Synonyms
* (type of secondary school) prep school, college prep school
Related terms
* gym
* gymnastics