execration vs loathing

execration and loathing both are nouns.

Word	Noun	Adjective	Verb	Adverb
execration	Yes	No	No	No
loathing	Yes	No	No	No

As nouns, execration and loathing are synonyms defined as:

Other synonyms of execration include abhorrence, abomination, detestation, odium.

execration (noun)	loathing (noun)
the object of cursing or detestation; that which is execrated	hate coupled with disgust
an appeal to some supernatural power to inflict evil on someone or some group
hate coupled with disgust