1) Amazement 2) Astonishment 3) French word used in English 4) Making dull or lethargic 5) Marginal consciousness 6) Overwhelming amazement 7) Stupor 8) The action of stupefying 9) The state of being stupefied Found on https://www.crosswordclues.com/clue/stupefaction
Stu`pe·fac'tion noun [ Confer French stupéfaction . See Stupefacient .] The act of stupefying, or the state of being stupefied. [ Written also stupifaction .] « Resistance of the dictates of conscience brings a hardness and stupefaction upon it.» South. Found on http://www.encyclo.co.uk/webster/S/216
noun the action of stupefying; making dull or lethargic; `the professor was noted for his stupefaction of the students` Found on https://www.encyclo.co.uk/local/20974