varicosity vs varix

varicosity and varix both are nouns.

Word	Noun	Adjective	Verb	Adverb
varicosity	Yes	No	No	No
varix	Yes	No	No	No

As nouns, varix is a hypernym of varicosity; that is, varix is a word with a broader meaning than varicosity:

varicosity: varix or varicose condition in which a vein is swollen and tortuous
varix: abnormally enlarged or twisted blood vessel or lymphatic vessel

varicosity (noun)	varix (noun)
varix or varicose condition in which a vein is swollen and tortuous	abnormally enlarged or twisted blood vessel or lymphatic vessel