Synonyms and related words :
artless, bluff, blunt, born yesterday, candid, childlike, credulous, dependent, depending, direct, frank, guileless, ingenu, ingenuous, innocent, naive, open, openhearted, outspoken, plain, reliant, relying, simple, simplehearted, simpleminded, sincere, single-hearted, single-minded, trustful, trusting, trusty, unguarded, unreserved, unsophisticated, unsuspecting, unsuspicious, unwary, without suspicion,