1) Boiled 2) Boiled vigorously 3) Boiled with anger 4) Boiled with ire 5) Came to a boil 6) Churned 7) Churned as if boiling 8) Did a slow burn 9) Got angry 10) Got really irate 11) Saw red 12) Simmered 13) Simmered with rage 14) Smoldered with rage 15) Was agitated 16) Was boiling mad 17) Was enraged 1) Boiled 2) Fumed 
• (p. p.) of Seethe • (imp.) of Seethe