Antonym: changeable, inconstant, mutable. Similar words: instant, instantly, consultant, instance, distant, for instance, assistant, substantial. Meaning: ['kɑnstənt /'kɒn-] 
n. 1. a quantity that does not vary 2. a number representing a quantity assumed to have a fixed value in a specified mathematical context. adj. 1. persistent in occurrence and unvarying in nature 2. continually recurring or continuing without interruption 3. steadfast in purpose or devotion or affection 4. uninterrupted in time and indefinitely long continuing.
n. 1. a quantity that does not vary 2. a number representing a quantity assumed to have a fixed value in a specified mathematical context. adj. 1. persistent in occurrence and unvarying in nature 2. continually recurring or continuing without interruption 3. steadfast in purpose or devotion or affection 4. uninterrupted in time and indefinitely long continuing. 
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91. The constant interruptions stopped me settling to my work.
92. Even great musicians require constant practice.
93. Your constant criticism has deadened their enthusiasm.
94. She was in constant pain.
95. Light travels at a constant velocity.
96. Constant criticism can be very demotivating.
97. Her constant shuffling of newspapers disconcerted us.
98. She made Jeff edgy with her constant demands.
99. He's in constant trouble with the police.
100. The lock has broken through constant use.
101. We were under constant mortar fire.
102. In history, change is constant.
103. All variables except one must be held constant.
104. The constant criticism was beginning to undermine her confidence.
105. Her constant interruptions were very aggravating.
106. Traffic noise is a source of constant irritation.
107. The buttresses are subjected to constant stress.
108. I can't concentrate with Ann's constant chatter.
109. The thief went in constant fear of discovery.
110. The phone is in constant use.
111. She has fought a constant battle with her weight.
112. It is a problem that requires constant monitoring.
112. Sentencedict.com is a sentence dictionary, on which you can find excellent sentences for a large number of words.
113. The country's borders are kept under constant surveillance.
114. She managed to escape her boss's constant supervision.
115. You have the constant feeling you are being manipulated.
116. Constant pressure atrophies the mind.
117. Drugs are a problem that requires constant vigilance.
118. Poverty is many people's constant dread.
119. Her constant nagging drove him away.
120. Children are so demanding: they need constant attention.
More similar words: instant, instantly, consultant, instance, distant, for instance, assistant, substantial, construct, substantially, constraint, constitute, construction, constitution, constructing, constitutional, non-stop, monster, stand, install, stand by, stand for, stance, stand up, stand out, important, reluctant, standard, CONS, demonstrate.