1) Became anxious 2) Became edgy 3) Became jittery 4) Became rigid 5) Became stiff 6) Became strained 7) Became taut 8) Braced 9) Finite 10) Got anxious 11) Got edgy 12) Got nervous 13) Got the yips 14) Got tight 15) Got tighter 16) Got uptight 17) Got wound up 18) Grew nervous 19) Grew rigid 20) Made taut 1) Taut 
[adj] - having inflections to indicate tense
adjective having inflections to indicate tense