N for n
The 'substitute' group
These nouns refer to a substitute for something or someone.
Anyone got change for a pound?
I was terrified when I was sent by my agent to Vogue as a replacement for a girl who was suddenly taken ill.
In the case of substitute, the preposition for is sometimes followed by an '-ing' clause.
change proxy replacement stand-in substitute surrogate
In the first place, there is no substitute for learning on the job.