candidiasis vs fungal infection

candidiasis and fungal infection both are nouns.

Word	Noun	Adjective	Verb	Adverb
candidiasis	Yes	No	No	No
fungal infection	Yes	No	No	No

As nouns, fungal infection is a hypernym of candidiasis; that is, fungal infection is a word with a broader meaning than candidiasis:

candidiasis: an infection caused by fungi of the genus Monilia or Candida (especially Candida albicans)
fungal infection: an inflammatory condition caused by a fungus

Other hypernyms of candidiasis include mycosis.

candidiasis (noun)	fungal infection (noun)
an infection caused by fungi of the genus Monilia or Candida (especially Candida albicans)	an inflammatory condition caused by a fungus