telex machine vs teletype machine

telex machine and teletype machine both are nouns.

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

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

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

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

telex machine (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