materfamilias vs matriarch

materfamilias and matriarch both are nouns.

Word	Noun	Adjective	Verb	Adverb
materfamilias	Yes	No	No	No
matriarch	Yes	No	No	No

As nouns, materfamilias and matriarch are synonyms defined as:

materfamilias (noun)	matriarch (noun)
a female head of a family or tribe	a female head of a family or tribe
	a feisty older woman with a big bosom (as drawn in cartoons)