assistance;  support;  subsidy;  supplement;  auxiliary;  subsidiary
 supply;  supplying;  replenishment
 correction;  revision;  compensation (e.g. to a pendulum)
 reinforcement;  strengthening
 filling a vacancy;  supplementation;  substitute;  deputy;  alternate
 supplementary explanation;  supplementary information
 candidate;  contender;  prospect;  candidacy;  candidature;  nomination
 addition (to a text);  additional entry (e.g. to a database)
 adding something to or altering a finished work of art;  something added or altered in this manner
 complementation;  supplementation;  completion
 supplementary classes or lectures
 compensation payment;  reparation
 extending (e.g. a book);  augmenting;  enlarging;  supplementing
 complementary color;  complementary colour
 dietary supplement (for sports);  energy supplement;  nutritional supplement
 retouch;  correction;  improvement
 complementary set;  complement
 bye-election;  by-election
 rehydration;  supply of water
 supplement;  supplementary volume
 assistant judge;  judge-in-training
 supportive device (for the disabled, e.g. prosthetic limb);  assistive device
 complement (blood proteins)
 subsidiary verb (in Japanese);  auxiliary verb
 revitalizing treatment that stimulates the organs or the meridians (in Chinese medicine)
 adjuvant;  revitalizing stimulant (in Chinese medicine)
 appointment to an official post
 Assistant Secretary of State
 locking the barn door after the horse has bolted;  doing something too late; (lit.) mending the pen after the sheep are lost