61.adult n., adj.

62.advance n., v.

63.advanced adj.

64.in advance

65.advantage n.

66.take advantage of

67.adventure n.

68.advertise v.

69.advertising n.

70.advertisement (also ad, advert) n.

71.advice n.

72.advise v.

73.affair n.

74.affect v.

75.affection n.

76.afford v.

77.afraid adj.

78.after prep., conj., adv.

79.afternoon n.

80.afterwards (especially BrE; NAmE usually afterward) adv.