irrigation vs medical specialty

irrigation and medical specialty both are nouns.

Word	Noun	Adjective	Verb	Adverb
irrigation	Yes	No	No	No
medical specialty	Yes	No	No	No

irrigation (noun)	medical specialty (noun)
supplying dry land with water by means of ditches etc	the branches of medical science that deal with nonsurgical techniques
(medicine) cleaning a wound or body organ by flushing or washing out with water or a medicated solution