schedule vs calendar

schedule and calendar both are nouns.

Word	Noun	Adjective	Verb	Adverb
schedule	Yes	No	Yes	No
calendar	Yes	No	Yes	No

As verbs, calendar is a hyponym of schedule; that is, calendar is a word with a more specific, narrower meaning than schedule:

Other hyponyms of schedule include time, book, slot.

schedule (noun)	calendar (noun)
a temporally organized plan for matters to be attended to	a list or register of events (appointments or social events or court cases etc)
an ordered list of times at which things are planned to occur	a tabular array of the days (usually for one year)
	a system of timekeeping that defines the beginning and length and divisions of the year

schedule (verb)	calendar (verb)
plan for an activity or event	enter into a calendar
make a schedule; plan the time and place for events