straight-from-the-shoulder vs plainspoken

straight-from-the-shoulder and plainspoken both are adjectives.

Word	Noun	Adjective	Verb	Adverb
straight-from-the-shoulder	No	Yes	No	No
plainspoken	No	Yes	No	No

As adjectives, straight-from-the-shoulder and plainspoken are synonyms defined as:

straight-from-the-shoulder and plainspoken: characterized by directness in manner or speech; without subtlety or evasion

Other synonyms of straight-from-the-shoulder include blunt, candid, forthright, frank, free-spoken, outspoken, point-blank.

straight-from-the-shoulder (adjective)	plainspoken (adjective)
characterized by directness in manner or speech; without subtlety or evasion	characterized by directness in manner or speech; without subtlety or evasion
	using simple and direct language