overcharge vs surcharge

overcharge and surcharge both are nouns.

Word	Noun	Adjective	Verb	Adverb
overcharge	Yes	No	Yes	No
surcharge	Yes	No	Yes	No

As verbs, overcharge and surcharge are synonyms defined as:

Other synonyms of overcharge include overload.

As verbs, overcharge and surcharge are synonyms defined as:

Other synonyms of overcharge include fleece, gazump, hook, pluck, plume, rob, soak.

overcharge (noun)	surcharge (noun)
a price that is too high	an additional charge (as for items previously omitted or as a penalty for failure to exercise common caution or common skill)

overcharge (verb)	surcharge (verb)
place too much a load on	show an omission in (an account) for which credit ought to have been given
rip off; ask an unreasonable price	fill to an excessive degree
	place too much a load on
	print a new denomination on a stamp or a banknote
	fill to capacity with people
	rip off; ask an unreasonable price
	charge an extra fee, as for a special service