schedule vs reschedule

schedule is a noun but reschedule is not a noun.

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

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

Other hyponyms of schedule include program, programme.

schedule (noun)	reschedule (noun)
a temporally organized plan for matters to be attended to
an ordered list of times at which things are planned to occur

schedule (verb)	reschedule (verb)
plan for an activity or event	assign a new time and place for an event
make a schedule; plan the time and place for events