1.abandon

2.abandoned

3.ability

4.able

5.unable

6.about

7.above

8.abroad

9.absence

10.absent

11.absolute

12.absolutely

13.absorb

14.abuse

15.academic

16.accent

17.accept

18.acceptable

19.unacceptable

20.access

21.accident

22.by accident

23.accidental

24.accidentally

25.accommodation

26.accompany

27.according to

28.account

29.accurate

30.accurately

31.accuse

32.achieve

33.achievement

34.acid

35.acknowledge

36.acquire

37.across

38.act

39.action

40.take action

41.active

42.actively

43.activity

44.actor, actress

45.actual

46.actually

47.ad advertisement

48.adapt

49.add

50.addition

51.in addition (to)

52.additional

53.address

54.adequate

55.adequately

56.adjust

57.admiration

58.admire

59.admit

60.adopt

61.adult

62.advance

63.advanced

64.in advance

65.advantage

66.take advantage of

67.adventure

68.advertise

69.advertising

70.advertisement ( ad, advert)

71.advice

72.advise

73.affair

74.affect

75.affection

76.afford

77.afraid

78.after

79.afternoon

80.afterwards ( afterward)

81.again

82.against

83.age

84.aged

85.agency

86.agent

87.aggressive

88.ago

89.agree

90.agreement

91.ahead

92.aid

93.aim

94.air

95.aircraft

96.airport

97.alarm

98.alarming

99.alarmed

100.alcohol