telex machine vs teleprinter

telex machine and teleprinter both are nouns.

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

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

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

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

telex machine (noun)	teleprinter (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