overcharge

nouns

a price that is too high
overcharge
is a type of (narrower)
the price charged for some article or service
"the admission charge"
charge

verbs

rip off; ask an unreasonable price
fleece, gazump, hook, overcharge, pluck, plume, rob, soak, surcharge
antonym
undercharge
place too much a load on
"don't overload the car"
overcharge, overload, surcharge