Execration, n.
Etymology: [L. execratio, exsecratio: cf. F. exécration.]
1. The act of cursing; a curse dictated by violent feelings of hatred; imprecation; utter detestation expressed. Cease, gentle, queen, these execrations. Shak.
2. That which is execrated; a detested thing. Ye shall be an execration and . . . a curse. Jer. xlii. 18.
Syn. -- See Malediction.
Shades of meaning
Fernald has no entry of its own for execration; he lists it under abomination, oath.
Where he writes about it:
Anathema, curse, execration, and imprecation are modes of invoking vengeance or retribution from a superhuman power upon the person against whom they are uttered. — from oath
Execration expresses most of personal bitterness and hatred; imprecation refers especially to the coming of the desired evil upon the person against whom it is uttered. — from oath