| square(adjective, simple, innocent, ignorant, naive) |
| straightforward(genuine, unaffected, unpretentious) |
| sucker(simple, foolish, fresh, innocent, ignorant) |
| swallow whole(expression, adjective, naive, gullible, unsuspicious) |
| swallowing whole(expression, foolish, innocent, susceptible, naive) |
| taken in(adjective, foolish, innocent, susceptible, naive) |
| taking the bait(expression, foolish, innocent, susceptible, naive) |
| thoughtless |
| tractable(susceptible, gullible, impressionable) |
| trusty |
| tumbling for(expression, foolish, innocent, susceptible, naive) |
| turned on(expression, adjective, passionate, violent, enthusiastic) |
| unacquainted(adjective, kindly, ignorant, naive, unknowing) |
| unaffected(adjective, open, smooth, simple, easy) |
| unartificial(adjective, kindly, ignorant, naive, unknowing) |
| unassumed(adjective, open, simple, easy, real) |
| uncontrived(adjective, open, simple, easy, real) |
| uncool(adjective, kindly, ignorant, naive, unknowing) |
| undesigning(adjective, open, simple, easy, real) |
| unembarrassed(adjective, open, simple, easy, real) |