lead-acid accumulator vs lead-acid battery

lead-acid accumulator and lead-acid battery both are nouns.

Word	Noun	Adjective	Verb	Adverb
lead-acid accumulator	Yes	No	No	No
lead-acid battery	Yes	No	No	No

As nouns, lead-acid accumulator and lead-acid battery are synonyms defined as:

lead-acid accumulator and lead-acid battery: a battery with lead electrodes with dilute sulphuric acid as the electrolyte; each cell generates about 2 volts

lead-acid accumulator (noun)	lead-acid battery (noun)
a battery with lead electrodes with dilute sulphuric acid as the electrolyte; each cell generates about 2 volts	a battery with lead electrodes with dilute sulphuric acid as the electrolyte; each cell generates about 2 volts