irrigation vs clyster

irrigation and clyster both are nouns.

Word	Noun	Adjective	Verb	Adverb
irrigation	Yes	No	No	No
clyster	Yes	No	No	No

As nouns, clyster is a hyponym of irrigation; that is, clyster is a word with a more specific, narrower meaning than irrigation:

irrigation: (medicine) cleaning a wound or body organ by flushing or washing out with water or a medicated solution
clyster: an injection of a liquid through the anus to stimulate evacuation; sometimes used for diagnostic purposes

Other hyponyms of irrigation include eye-drop, eyedrop, douche, enema, lavage.

irrigation (noun)	clyster (noun)
supplying dry land with water by means of ditches etc	an injection of a liquid through the anus to stimulate evacuation; sometimes used for diagnostic purposes
(medicine) cleaning a wound or body organ by flushing or washing out with water or a medicated solution