• to hold one's ground, to hold one's own, to hold the field, to keep one's ground, to stand one's ground
• as good as one's word, to be as good as one's word, to be so good as one's word, to keep faith with sy, to keep one's word
• to be so good as one's word
• to come up to scratch, to pass muster, to pass the test, to stand the proof, to wash
• to hold one's own, to stand the proof
• to come through, to pull through, to stand one's ground
• to withstand the test of time
• to stand the test of time
• to cope with a situation