dry battery vs galvanic battery

dry battery and galvanic battery both are nouns.

Word	Noun	Adjective	Verb	Adverb
dry battery	Yes	No	No	No
galvanic battery	Yes	No	No	No

As nouns, galvanic battery is a hypernym of dry battery; that is, galvanic battery is a word with a broader meaning than dry battery:

dry battery: a voltaic battery consisting of two or more dry cells
galvanic battery: battery consisting of a number of voltaic cells arranged in series or parallel

Other hypernyms of dry battery include voltaic battery.

dry battery (noun)	galvanic battery (noun)
a voltaic battery consisting of two or more dry cells	battery consisting of a number of voltaic cells arranged in series or parallel