subordinate clause vs complex sentence

subordinate clause and complex sentence both are nouns.

Word	Noun	Adjective	Verb	Adverb
subordinate clause	Yes	No	No	No
complex sentence	Yes	No	No	No

subordinate clause (noun)	complex sentence (noun)
a clause in a complex sentence that cannot stand alone as a complete sentence and that functions within the sentence as a noun or adjective or adverb	a sentence composed of at least one main clause and one subordinate clause