the work of applying something; "the doctor prescribed a topical application of iodine"; "a complete bleach requires several applications"; "the surface was ready for a coating of paint";
17
administration
the act of administering medication
9
application
the act of bringing something to bear; using it for a particular purpose; "he advocated the application of statistics to the problem"; "a novel application of electronics to medical diagnosis
7
use
the act of using; "the steps were worn from years of use"
6
function
what something is used for; "the function of an auger is to bore holes"; "ballet is beautiful but what use is it?"