nycturia vs nocturia

nycturia and nocturia both are nouns.

Word	Noun	Adjective	Verb	Adverb
nycturia	Yes	No	No	No
nocturia	Yes	No	No	No

As nouns, nycturia and nocturia are synonyms defined as:

nycturia and nocturia: excessive urination at night; especially common in older men

nycturia (noun)	nocturia (noun)
excessive urination at night; especially common in older men	excessive urination at night; especially common in older men