Byth, bite.
Blaberyn, [164], [384], talk idly. “Blaberyn or speke withowte resoun, blatero,” Prompt. Parv.
Ble, [20], generally means complexion. “Bryth as ble,” should probably be “bryth of ble,” i. e., bright of complexion. See Kyng of Tars, l. 368, “Heo that was so bryht of ble.”
Blenke, blink, a wink of the eye in derision.
Blere, [98], dim.
Blyn, [338], cease.
Blome, [65], bloom, blossom.
Blosme, blossom.