straightforwardly vs foursquare

straightforwardly is not a noun while foursquare is a noun.

Word	Noun	Adjective	Verb	Adverb
straightforwardly	No	No	No	Yes
foursquare	Yes	Yes	No	Yes

As adverbs, straightforwardly and foursquare are synonyms defined as:

straightforwardly and foursquare: with firmness and conviction; without compromise

Other synonyms of straightforwardly include squarely.

straightforwardly (noun)	foursquare (noun)
	(geometry) a plane rectangle with four equal sides and four right angles; a four-sided regular polygon

straightforwardly (adjective)	foursquare (adjective)
	characterized by firm and unwavering conviction

straightforwardly (adverb)	foursquare (adverb)
with firmness and conviction; without compromise	with firmness and conviction; without compromise
	in a square position