Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun subbing

1 sense of subbing

Sense 1
subbing, substituting -- (working as a substitute for someone who is ill or on leave of absence)
       => work -- (activity directed toward making or doing something; "she checked several points needing further work")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb sub

1 sense of sub

Sense 1
substitute, sub, stand in, fill in -- (be a substitute; "The young teacher had to substitute for the sick colleague"; "The skim milk substitutes for cream--we are on a strict diet")
       => exchange, change, interchange -- (give to, and receive from, one another; "Would you change places with me?"; "We have been exchanging letters for a year")