plowshare vs ploughshare

plowshare and ploughshare both are nouns.

Word	Noun	Adjective	Verb	Adverb
plowshare	Yes	No	No	No
ploughshare	Yes	No	No	No

As nouns, plowshare and ploughshare are synonyms defined as:

plowshare and ploughshare: a sharp steel wedge that cuts loose the top layer of soil

Other synonyms of plowshare include share.

plowshare (noun)	ploughshare (noun)
a sharp steel wedge that cuts loose the top layer of soil	a sharp steel wedge that cuts loose the top layer of soil