schedule vs timetable

schedule and timetable both are nouns.

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

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

Other hyponyms of schedule include network programming.

schedule (noun)	timetable (noun)
a temporally organized plan for matters to be attended to	a schedule of times of arrivals and departures
an ordered list of times at which things are planned to occur	a schedule listing events and the times at which they will take place

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