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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1. Constant dropping wears the stone.
2. A constant guest is never welcome. 
3. A man should keep his friendship in constant repair.
4. He who makes constant complaint gets little compassion.
5. Constant dropping wears away a stone.
6. He was harried by constant bothering of his fans.
7. The constant pain made her life intolerable.
8. Her mind was in a state of constant turmoil.
9. I was infuriated by / with their constant criticism.
10. She was in constant physical pain.
11. Always my a pair comity is constant.
12. Inflation is a constant threat.
13. How do you demonstrate that the pressure remains constant?
14. Her constant chatter was starting to annoy me.
15. I could hear the constant hum of distant traffic.
16. Constant rejection has sapped her will.
17. Fear was the hostages' constant companion.
18. Their whole life was a constant battle against poverty.
19. His constant sniffing annoys me.
20. He was arrested after being kept under constant surveillance.
21. He is in constant conflict with the authorities.
22. We've kept up a fairly constant speed.
23. We lived in constant fear of losing our jobs.
24. Constant indulgence in bad habits brought about his ruin.
25. Salaries are kept under constant review.
26. This entrance is in constant use.
27. In our world nothing seems constant.
28. His constant requests for help taxed our goodwill.
29. They were under constant close surveillance day and night.
30. The greatest friend of truth is time, her greatest enemy is prejudice[http://sentencedict.com], and her constant companion is humility.
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.