Irate, a.
Etymology: [L. iratus, fr. irasci to be angry. See Ire.]
Angry; incensed; enraged. [Recent] The irate colonel . . . stood speechless. Thackeray. Mr. Jaggers suddenly became most irate. Dickens.
Shades of meaning
Fernald has no entry of its own for irate; he lists it under bitter.
He lists it without comment; the entries above explain its neighbors.