outspoken vs straight-from-the-shoulder

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

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

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

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

Other synonyms of outspoken include blunt, candid, forthright, frank, free-spoken, plainspoken, point-blank.

outspoken (adjective)	straight-from-the-shoulder (adjective)
given to expressing yourself freely or insistently	characterized by directness in manner or speech; without subtlety or evasion
characterized by directness in manner or speech; without subtlety or evasion