Synonyms for Sterilizing:

v.

castrating (verb)
Castrating, spaying, Emasculating, unmanning, gelding, cutting.
cleaning (verb)
washing, purifying, purging, scrubbing, sweeping, ordering, laundering, cleaning, Filtering, clearing, cleansing, Tidying, Disinfecting, sanitizing, Wiping.
purifying (verb)
Simplifying, refining.