drop hammer vs drop forge

drop hammer and drop forge both are nouns.

Word	Noun	Adjective	Verb	Adverb
drop hammer	Yes	No	No	No
drop forge	Yes	No	No	No

As nouns, drop hammer and drop forge are synonyms defined as:

Other synonyms of drop hammer include drop press.

drop hammer (noun)	drop forge (noun)
device for making large forgings	device for making large forgings