surcharge vs overcharge

surcharge and overcharge both are nouns.

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

As verbs, surcharge and overcharge are synonyms defined as:

Other synonyms of surcharge include overload.

As verbs, surcharge and overcharge are synonyms defined as:

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

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

surcharge (verb)	overcharge (verb)
show an omission in (an account) for which credit ought to have been given	place too much a load on
fill to an excessive degree	rip off; ask an unreasonable price
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