Synonym: baneful, deathly, deucedly, devilishly, insanely, lethal, lifelessly, madly, mortal, mortal, pernicious, pestilent, venomous, virulent. Similar words: deadline, badly, headline, idea, death, rapidly, dealer, deal in. Meaning: ['dedlɪ] 
adj. 1. causing or capable of causing death 2. of an instrument of certain death 3. extremely poisonous or injurious; producing venom 4. involving loss of divine grace or spiritual death 5. exceedingly harmful 6. (of a disease) having a rapid course and violent effect. adv. 1. as if dead 2. as if produced by death 3. (used as intensives) extremely.
adj. 1. causing or capable of causing death 2. of an instrument of certain death 3. extremely poisonous or injurious; producing venom 4. involving loss of divine grace or spiritual death 5. exceedingly harmful 6. (of a disease) having a rapid course and violent effect. adv. 1. as if dead 2. as if produced by death 3. (used as intensives) extremely. 
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31. The film was long and deadly dull.
32. You may laugh but I'm in deadly earnest.
33. The lecture was absolutely deadly.
34. I'm deadly serious, this isn't a game!
35. The water had been tainted with a deadly toxin.
36. The Duchess levelled a deadly look at Nikko.
37. She hit the target with deadly accuracy.
38. His face had a deadly paleness.
39. The stonefish is the most deadly of all fishes.
40. Both mushrooms look innocuous but are in fact deadly.
41. The party was deadly.
42. She took the gun and blazed away with calm and deadly accuracy.
43. They took him to the station and booked him for assault with a deadly weapon.
44. The robbery took a deadly new twist as the robber pulled out a gun.
45. "I'm calling the police,[www.Sentencedict.com] " he stated with deadly calm.
46. It was the deadly striker's 11 th goal of the season.
47. The Energy Department plans to solidify the deadly waste in a high-tech billion-dollar factory.
48. These fanatics are in deadly earnest when they say they want to destroy all forms of government.
49. Although he smiled,(sentencedict.com) Ashley knew he was in deadly earnest.
50. The government must take action to fight this deadly disease.
51. 'Whatever you say,' he said in a deadly flat voice. 'I'll sit here and wait.'.
52. It is very unnerving to find out that someone you see every day is carrying a potentially deadly virus.
53. The seven deadly sins are covetousness, envy, gluttony, lust, pride, anger and sloth.
54. I'm in deadly earnest.
55. They play deadly rivals in the show but they are good friends off screen.
56. So quiet for something so deadly.
57. Mr Roberts and I are deadly enemies.
58. The woman's face had a deadly paleness.
59. He memorized the use of deadly force.
60. And looked quickly for something more deadly?
More similar words: deadline, badly, headline, idea, death, rapidly, dealer, deal in, deal out, allegedly, friendly, hardly any, supposedly, a big deal, deal with, repeatedly, reportedly, a good deal, a good deal of, upwardly mobile, the death penalty, head, lead, read, plead, leader, head up, head on, head for, thread.