Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Brīmo, ūs, f., = Βρῖμώ (prop. the angry one; cf. Arn. 5, p. 170), a name of Proserpine, Prop. 2, 2, 12.
Acc. Brimo, Stat. S. 2, 3, 38.