odorization
noun
odor·iza·tion
ˌōdərə̇ˈzāshən,
-ˌrīˈz-
plural -s
: the act or process of odorizing
reodorization of rubber and leather articles—A. C. Morrison
especially
: the act or process of odorizing gas
odor tests should be made on the gas at the point of odorization —Chemical Abstracts
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Merriam-Webster unabridged
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