Synonyms for Plainspoken (same or very similar meaning)
WordNet sense 1 (not rhetorical):
unrhetoricalWordNet sense 2 (characterized by directness in manner or speech; without subtlety or evasion):
blunt, candid, forthright, frank, outspoken, point-blank, free-spoken, straight-from-the-shoulderWordNet sense 3 (extended senses; direct in means or manner or behavior or language or action):
directFrom the ODE community, based on WordNetadd/edit