synchronous converter vs rotary converter

synchronous converter and rotary converter both are nouns.

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

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

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

Other synonyms of synchronous converter include rotary.

synchronous converter (noun)	rotary 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