cassette recorder vs recorder

cassette recorder and recorder both are nouns.

Word	Noun	Adjective	Verb	Adverb
cassette recorder	Yes	No	No	No
recorder	Yes	No	No	No

As nouns, recorder is a hypernym of cassette recorder; that is, recorder is a word with a broader meaning than cassette recorder:

Other hypernyms of cassette recorder include recording equipment, recording machine.

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