rotary converter vs synchronous converter

rotary converter and synchronous converter both are nouns.

Word	Noun	Adjective	Verb	Adverb
rotary converter	Yes	No	No	No
synchronous converter	Yes	No	No	No

As nouns, rotary converter and synchronous converter are synonyms defined as:

rotary converter and synchronous converter: electrical converter consisting of a synchronous machine that converts alternating to direct current or vice versa

Other synonyms of rotary converter include rotary.

rotary converter (noun)	synchronous converter (noun)
electrical converter consisting of a synchronous machine that converts alternating to direct current or vice versa	electrical converter consisting of a synchronous machine that converts alternating to direct current or vice versa