recorder vs recording machine

recorder and recording machine both are nouns.

Word	Noun	Adjective	Verb	Adverb
recorder	Yes	No	No	No
recording machine	Yes	No	No	No

As nouns, recorder and recording machine are synonyms defined as:

Other synonyms of recorder include recording equipment.

recorder (noun)	recording machine (noun)
a tubular wind instrument with 8 finger holes and a fipple mouthpiece	equipment for making records
equipment for making records
someone responsible for keeping records
a barrister or solicitor who serves as part-time judge in towns or boroughs