Similar words: certain, certainly, certainty, ascertain, for certain, uncertain, uncertainly, certainly not.
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1. Make certain what time the train goes.
2. I am prepared to make certain concessions.
3. You should make certain everyone understands the instructions.
4. Make certain we have enough drink for the party.
5. You'll have to leave soon to make certain of getting there on time.
6. She shook it to make certain there was nothing inside.
7. He got up at six so as to make certain of being in time.
8. We need to make certain that it's going to fit first.
9. Firstly(sentencedict.com/make certain.html), they must make certain that their pension needs are adequately catered for.
10. Make certain that you lock the door if you go out.
11. You'd better leave now if you want to make certain of getting there on time.
12. Secure the edges firmly to make certain that no moisture can get in.
13. She flicked her eyes up to make certain I was suitably impressed.
14. Here, too[sentencedict.com], he was forced to make certain concessions.
15. Make certain that it spells out exactly what is intended to be accomplished by the proposal writer.
16. He watched her long enough to make certain she was breathing.
17. I went back into the house to make certain the stove was turned off.
18. Make certain that ideas are clearly delineated and most of all, avoid the use of professional jargon.
19. But to make certain that MacDonald would be chosen, he had to be sure of his own party and the Liberals.
20. Contractors are working hard to make certain all the homes will be ready for occupation as soon as possible.
21. She talked to family members to make certain they were ready for the patient and wanted the patient at home.
22. The way to win an atomic war is to make certain it never starts. 
23. I think there's a train at 8.20 but you ought to make certain.
24. Even if a ceasefire can be agreed, how can they make certain neither side breaks it?
25. I think there's a bus at 8 but you'd better call to make certain.
26. It is precisely because all is not certain that we have to make certain.
27. Despite its failings, though, the telescope still has unique abilities to make certain observations.
28. Without detailing these problems and their solutions in a reduction in dependence on car use, one can make certain observations.
29. It is a matter of fact in each case whether a child has sufficient understanding to make certain decisions or take certain actions.
30. Nicholas knelt, then lifted him to the base of the wall and knelt again, to make certain.
More similar words: certain, certainly, certainty, ascertain, for certain, uncertain, uncertainly, certainly not, ascertained, uncertainty, to a certain degree, in no uncertain terms, uncertainty principle, pertain, pertain to, appertain, entertain, entertained, entertainer, entertaining, entertainment, make a mountain out of a molehill, curtain, make common cause with, curtain call, curtained, decertify, overtake, iron curtain, overtaken.