surcharge vs load up

surcharge is a noun but load up is not a noun.

Word	Noun	Adjective	Verb	Adverb
surcharge	Yes	No	Yes	No
load up	No	No	Yes	No

As verbs, load up is a hypernym of surcharge; that is, load up is a word with a broader meaning than surcharge:

Other hypernyms of surcharge include lade, laden, load.

surcharge (noun)	load up (noun)
an additional charge (as for items previously omitted or as a penalty for failure to exercise common caution or common skill)

surcharge (verb)	load up (verb)
show an omission in (an account) for which credit ought to have been given	fill or place a load on
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