WordNet records no synonym and no antonym for consecration. It is the only member of each of its synsets, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
a solemn commitment of your life or your time to some cherished purpose (to a service or a goal)
“his consecration to study”
(religion) sanctification of something by setting it apart (usually with religious rites) as dedicated to God
“the Cardinal attended the consecration of the church”
Synonyms, antonyms and the broader and narrower relations for consecration come from Princeton University’s WordNet. Full sources and licences.