calisthenics vs callisthenics

calisthenics and callisthenics both are nouns.

Word	Noun	Adjective	Verb	Adverb
calisthenics	Yes	No	No	No
callisthenics	Yes	No	No	No

As nouns, calisthenics and callisthenics are synonyms defined as:

As nouns, calisthenics and callisthenics are synonyms defined as:

calisthenics and callisthenics: light exercises designed to promote general fitness

calisthenics (noun)	callisthenics (noun)
the practice of calisthenic exercises	the practice of calisthenic exercises
light exercises designed to promote general fitness	light exercises designed to promote general fitness