recording vs bolograph

recording and bolograph both are nouns.

Word	Noun	Adjective	Verb	Adverb
recording	Yes	No	No	No
bolograph	Yes	No	No	No

As nouns, bolograph is a hyponym of recording; that is, bolograph is a word with a more specific, narrower meaning than recording:

recording: a signal that encodes something (e.g., picture or sound) that has been recorded
bolograph: record or recording made by a bolometer

Other hyponyms of recording include bologram, chromatogram, oscillogram, spirogram.

recording (noun)	bolograph (noun)
the act of making a record (especially an audio record)	record or recording made by a bolometer
a signal that encodes something (e.g., picture or sound) that has been recorded
a storage device on which information (sounds or images) have been recorded