forge vs work on

forge is a noun but work on is not a noun.

Word	Noun	Adjective	Verb	Adverb
forge	Yes	No	Yes	No
work on	No	No	Yes	No

forge (noun)	work on (noun)
a workplace where metal is worked by heating and hammering
furnace consisting of a special hearth where metal is heated before shaping

forge (verb)	work on (verb)
create by hammering	shape, form, or improve a material
make a copy of with the intent to deceive	to exert effort in order to do, make, or perform something
make out of components (often in an improvising manner)
make something, usually for a specific function
come up with (an idea, plan, explanation, theory, or principle) after a mental effort
move or act with a sudden increase in speed or energy
move ahead steadily