toxemia of pregnancy vs illness

toxemia of pregnancy and illness both are nouns.

Word	Noun	Adjective	Verb	Adverb
toxemia of pregnancy	Yes	No	No	No
illness	Yes	No	No	No

As nouns, illness is a hypernym of toxemia of pregnancy; that is, illness is a word with a broader meaning than toxemia of pregnancy:

toxemia of pregnancy: an abnormal condition of pregnancy characterized by hypertension and edema and protein in the urine
illness: impairment of normal physiological function affecting part or all of an organism

Other hypernyms of toxemia of pregnancy include malady, sickness, unwellness.

toxemia of pregnancy (noun)	illness (noun)
an abnormal condition of pregnancy characterized by hypertension and edema and protein in the urine	impairment of normal physiological function affecting part or all of an organism