| possible(adjective, reasonable, easy, susceptible, undemanding) |
| proof(noun, information, mark, sign, indication) |
| realizable(adjective, reasonable, easy, susceptible, possible) |
| sign(noun, information, mark, indication, signal) |
| significant(noun, information, mark, sign, indication) |
| simple(adjective, clear, smooth, easy, straightforward) |
| simple as ABC(expression, adjective, idiom, clear, smooth) |
| smoking gun(noun, expression, information, mark, sign) |
| snapper(noun, adjective, easy, susceptible, possible) |
| substantiation(noun, information, mark, sign, indication) |
| symptom(noun, information, mark, sign, indication) |
| testament(noun, information, mark, sign, indication) |
| testimonial(noun, information, mark, sign, indication) |
| testimony(noun, information, mark, sign, indication) |
| token(noun, information, mark, sign, indication) |
| undemanding(adjective, clear, smooth, simple, easy) |
| untroublesome(adjective, clear, smooth, simple, easy) |
| wieldy(adjective, clear, smooth, simple, easy) |
| within reach(expression, adjective, easy, susceptible, possible) |
| witness(noun, information, mark, sign, indication) |