flapjack vs pancake

flapjack and pancake both are nouns.

Word	Noun	Adjective	Verb	Adverb
flapjack	Yes	No	No	No
pancake	Yes	No	No	No

As nouns, flapjack and pancake are synonyms defined as:

flapjack and pancake: a flat cake of thin batter fried on both sides on a griddle

Other synonyms of flapjack include battercake, flannel-cake, flannel cake, flapcake, griddlecake, hot cake, hotcake.

flapjack (noun)	pancake (noun)
a flat cake of thin batter fried on both sides on a griddle	a flat cake of thin batter fried on both sides on a griddle