telegraph vs telecommunicate

telegraph is a noun but telecommunicate is not a noun.

Word	Noun	Adjective	Verb	Adverb
telegraph	Yes	No	Yes	No
telecommunicate	No	No	Yes	No

As verbs, telecommunicate is a hypernym of telegraph; that is, telecommunicate is a word with a broader meaning than telegraph:

telegraph: send cables, wires, or telegrams
telecommunicate: communicate over long distances, as via the telephone or e-mail

telegraph (noun)	telecommunicate (noun)
apparatus used to communicate at a distance over a wire (usually in Morse code)

telegraph (verb)	telecommunicate (verb)
send cables, wires, or telegrams	communicate over long distances, as via the telephone or e-mail