In obsolete|lang=en terms the difference between flat and parcel
is that
flat is (obsolete) a dull fellow; a simpleton while
parcel is (obsolete) part or half; in part; partially.
As adverbs the difference between flat and parcel
is that
flat is so as to be flat while
parcel is (obsolete) part or half; in part; partially.
As nouns the difference between flat and parcel
is that
flat is an area of level ground or
flat can be (archaic|new england|now chiefly british) an apartment while
parcel is a package wrapped for shipment.
As verbs the difference between flat and parcel
is that
flat is (poker slang) to make a flat call; to call without while
parcel is to wrap something up into the form of a package.
As an adjective flat
is having no variations in height.