telex vs teletype machine

telex and teletype machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
telex	Yes	No	Yes	No
teletype machine	Yes	No	No	No

As nouns, telex and teletype machine are synonyms defined as:

telex and teletype machine: a character printer connected to a telegraph that operates like a typewriter

Other synonyms of telex include teleprinter, teletypewriter, telex machine.

telex (noun)	teletype machine (noun)
a character printer connected to a telegraph that operates like a typewriter	a character printer connected to a telegraph that operates like a typewriter

telex (verb)	teletype machine (verb)
communicate by telex