toxaemia vs unwellness

toxaemia and unwellness both are nouns.

Word	Noun	Adjective	Verb	Adverb
toxaemia	Yes	No	No	No
unwellness	Yes	No	No	No

As nouns, unwellness is a hypernym of toxaemia; that is, unwellness is a word with a broader meaning than toxaemia:

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

Other hypernyms of toxaemia include illness, malady, sickness.

toxaemia (noun)	unwellness (noun)
blood poisoning caused by bacterial toxic substances in the blood	impairment of normal physiological function affecting part or all of an organism
an abnormal condition of pregnancy characterized by hypertension and edema and protein in the urine