100 Best Synonyms for “Ill”

No.	Item	Definition
1.	adverse	Harmful or unfavorable.
2.	afflicted	Troubled by illness or suffering.
3.	ailing	Sick or declining in health.
4.	arthritic	Affected by arthritis.
5.	ashen	Pale gray from illness.
6.	asthmatic	Affected by asthma.
7.	bad	Not good or harmful.
8.	bedbound	Unable to leave bed.
9.	bedridden	Confined to bed by illness.
10.	below par	Less healthy than usual.
11.	bilious	Nauseated or liverish.
12.	bloodless	Very pale or weak-looking.
13.	cadaverous	Deathly pale and thin.
14.	cancerous	Affected by cancer.
15.	chilled	Feeling cold from illness.
16.	clammy	Cold, damp, and unwell.
17.	consumptive	Affected by wasting disease.
18.	crook	Sick or unwell.
19.	deathly	Extremely pale or sickly.
20.	debilitated	Weakened by illness.
21.	delirious	Confused from fever or illness.
22.	diabetic	Affected by diabetes.
23.	diseased	Affected by disease.
24.	dizzy	Lightheaded and unsteady.
25.	drawn	Tired and unwell-looking.
26.	emaciated	Extremely thin from illness.
27.	enfeebled	Made weak, especially by illness.
28.	evil	Morally bad or harmful.
29.	exhausted	Extremely tired or weakened.
30.	faint	Weak and near collapsing.
31.	fatigued	Very tired, often from illness.
32.	febrile	Feverish.
33.	feeble	Very weak or infirm.
34.	feverish	Having or showing a fever.
35.	frail	Weak and delicate.
36.	gaunt	Thin and unwell-looking.
37.	ghastly	Pale and shockingly unwell-looking.
38.	grave	Seriously bad or dangerous.
39.	green around the gills	Looking nauseous or sick.
40.	groggy	Weak, dazed, and unwell.
41.	haggard	Exhausted and unwell-looking.
42.	harmful	Causing damage or injury.
43.	impaired	Weakened or damaged in function.
44.	incapacitated	Unable to function normally.
45.	indisposed	Slightly unwell.
46.	infected	Affected by harmful germs.
47.	infirm	Weak or chronically unwell.
48.	invalid	Chronically sick or disabled.
49.	jaundiced	Yellowed by liver illness.
50.	laid up	Confined by illness or injury.
51.	lethargic	Sluggish from weakness or illness.
52.	lightheaded	Dizzy or faint.
53.	listless	Lacking energy from illness.
54.	liverish	Slightly sick or bilious.
55.	low	Weak or unwell in spirits.
56.	malaise-ridden	Affected by general illness.
57.	malaise-stricken	Suffering general discomfort.
58.	malefic	Causing harm or evil.
59.	malignant	Dangerously diseased or cancerous.
60.	morbid	Diseased or unhealthy.
61.	mortal	Deadly or life-threatening.
62.	nauseated	Feeling as if vomiting.
63.	nauseous	Feeling sick to the stomach.
64.	not well	Unwell.
65.	noxious	Harmful or poisonous.
66.	off color	Slightly unwell.
67.	off form	Not at normal health.
68.	off-colour	Slightly unwell.
69.	out of sorts	Slightly unwell or unsettled.
70.	pale	Unwell-looking and lacking color.
71.	pallid	Pale, often from illness.
72.	peaky	Pale and unwell-looking.
73.	pneumonic	Affected by pneumonia.
74.	poisoned	Harmed by poison.
75.	poorly	Sick or unwell.
76.	queasy	Slightly nauseous or sick.
77.	run-down	Weak from tiredness or illness.
78.	septic	Infected with harmful bacteria.
79.	sick	Affected by illness.
80.	sickened	Made or become sick.
81.	sickly	Often unwell or unhealthy.
82.	stricken	Seriously affected by illness.
83.	subpar	Below normal condition.
84.	suffering	Experiencing illness or pain.
85.	symptomatic	Showing signs of illness.
86.	terminal	Having an incurable fatal illness.
87.	toxic	Poisonous or harmful.
88.	tubercular	Affected by tuberculosis.
89.	under par	Below normal health.
90.	under the weather	Mildly sick or unwell.
91.	unfit	Not healthy or capable.
92.	unhealthy	Not healthy or well.
93.	unwell	Not in good health.
94.	unwholesome	Not healthy or morally good.
95.	wan	Pale and sickly-looking.
96.	wasted	Made thin by illness.
97.	weak	Lacking strength from illness.
98.	weakened	Reduced in strength.
99.	wicked	Morally bad or evil.
100.	woozy	Dizzy and unwell.