inclementness vs bad weather

inclementness and bad weather both are nouns.

Word	Noun	Adjective	Verb	Adverb
inclementness	Yes	No	No	No
bad weather	Yes	No	No	No

As nouns, inclementness and bad weather are synonyms defined as:

inclementness and bad weather: weather unsuitable for outdoor activities

Other synonyms of inclementness include inclemency.

inclementness (noun)	bad weather (noun)
weather unsuitable for outdoor activities	weather unsuitable for outdoor activities