pains vs striving

pains and striving both are nouns.

Word	Noun	Adjective	Verb	Adverb
pains	Yes	No	No	No
striving	Yes	No	No	No

As nouns, pains and striving are synonyms defined as:

Other synonyms of pains include nisus, strain.

pains (noun)	striving (noun)
an effortful attempt to attain a goal	an effortful attempt to attain a goal