main clause vs independent clause

main clause and independent clause both are nouns.

Word	Noun	Adjective	Verb	Adverb
main clause	Yes	No	No	No
independent clause	Yes	No	No	No

As nouns, main clause and independent clause are synonyms defined as:

main clause and independent clause: a clause in a complex sentence that can stand alone as a complete sentence

main clause (noun)	independent clause (noun)
a clause in a complex sentence that can stand alone as a complete sentence	a clause in a complex sentence that can stand alone as a complete sentence