irrational vs irrational number

irrational and irrational number both are nouns.

Word	Noun	Adjective	Verb	Adverb
irrational	Yes	Yes	No	No
irrational number	Yes	No	No	No

As nouns, irrational and irrational number are synonyms defined as:

irrational and irrational number: a real number that cannot be expressed as a rational number

irrational (noun)	irrational number (noun)
a real number that cannot be expressed as a rational number	a real number that cannot be expressed as a rational number

irrational (adjective)	irrational number (adjective)
not consistent with or using reason
real but not expressible as the quotient of two integers