chill vs gelidity

chill and gelidity both are nouns.

Word	Noun	Adjective	Verb	Adverb
chill	Yes	No	Yes	No
gelidity	Yes	No	No	No

As nouns, chill and gelidity are synonyms defined as:

Other synonyms of chill include iciness.

chill (noun)	gelidity (noun)
coldness due to a cold environment	coldness due to a cold environment
a sudden numbing dread
an almost pleasurable sensation of fright
a sensation of cold that often marks the start of an infection and the development of a fever