Perhaps so, but there are only 5 uses of 'authentic' which I feel is almost an exact synonym and a similarly common word - I wouldn't think you need a thesaurus

Perhaps so, but there are only 5 uses of 'authentic' which I feel is almost an exact synonym and a similarly common word - I wouldn't think you need a thesaurus for that one. Another relatively semantically close word, 'honest' shows up 43 times also, but there's an entire section headed 'being honest' so that's pretty fair.