backstop vs softball

backstop and softball both are nouns.

Word	Noun	Adjective	Verb	Adverb
backstop	Yes	No	Yes	No
softball	Yes	No	No	No

backstop (noun)	softball (noun)
a precaution in case of an emergency	a game closely resembling baseball that is played on a smaller diamond and with a ball that is larger
(baseball) a fence or screen (as behind home plate) to prevent the ball from traveling out of the playing field	ball used in playing softball
(baseball) the person who plays the position of catcher

backstop (verb)	softball (verb)
act as a backstop