Antonym: neither. Similar words: bother, robot, bottled, other, others, mother, another, tooth. Meaning: [bəʊθ] 
adj. (used with count nouns) two considered together; the two.
adj. (used with count nouns) two considered together; the two. 
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61. Nepal has frontiers with both India and China.
62. Hovercraft can travel both on land and water.
63. His mother and father are both doctors.
64. These two hotels are both excellent establishments.
65. It is worthwhile to note that both suffered persecution.
66. The road was blocked in both directions.
67. Getting both sides to agree was a notable achievement.
68. It is both cheap and abundantly available.
69. She kissed him on both cheeks.
70. Both candidates received an equal number of votes.
71. He was paralysed in both legs.
72. They'd both lived in this road all their lives.
73. The book is both inaccurate and exaggerated.
74. The farm has both beef and dairy cattle.
75. Torture always dehumanizes both the torturer and his victim.
75. Sentencedict.com is a sentence dictionary, on which you can find nice sentences for a large number of words.
76. Both books/Both the books/Both these books are expensive.
77. They were both in the same line of business.
78. Toast the bread lightly on both sides.
79. Changes have taken place both economically and politically.
80. Both sisters bit their nails as children.
81. They both said much the same thing.
82. His mother and father are both college teachers.
83. Both are blessed with uncommon ability to fix things.
84. He fired two shots, both missed.
85. Prevention and cure are both attended to.
86. It was a stylish performance by both artists.
87. Both buildings were badly affected by the fire.
88. We are both somewhat ambivalent about having a child.
89. Obviously we're better off now we're both working.
90. You cannot burn the candle at both ends.
More similar words: bother, robot, bottled, other, others, mother, another, tooth, brother, booth, one another, nothing, and others, smooth, so that, mothering, each other, cannot help, other than, smooth out, grandmother, clothing, to the life, the other day, two-thirds, nothing but, every other, go through, to the full, to the limit.