rigour vs hardship

rigour and hardship both are nouns.

Word	Noun	Adjective	Verb	Adverb
rigour	Yes	No	No	No
hardship	Yes	No	No	No

As nouns, rigour and hardship are synonyms defined as:

Other synonyms of rigour include asperity, grimness, rigor, rigorousness, rigourousness, severeness, severity.

rigour (noun)	hardship (noun)
something hard to endure	something hard to endure
the quality of being valid and rigorous	something that causes or entails suffering
excessive sternness	a state of misfortune or affliction