Correct spelling, explanation: the word sentence is a very common word in English. However, some of the language users tend to forget that it should be spelled with the -c consonant and write it with the -s instead. You have to avoid that mistake. Sentense is not correct – we can learn that from the etymology.

Definition of sentence:
1. noun, a punishment given by a judge in court to a person or organization after they have been found guilty of doing something wrong
The judge gave the defendant a harsh sentence of ten years in prison.
She served a three-year prison sentence.
2. verb, to declare punishment for someone after they have been found guilty of a crime
He was sentenced to life imprisonment.
The court will sentence the convicted fraudster to pay restitution of $100,000 to the victims.

Collocations with sentence:
Some most commonly used collocations include: complete a sentence, suspended sentence
After completing his sentence, he was released from prison.
The judge gave him a suspended sentence, warning him to stay out of trouble or face the consequences.

Incorrect spelling, explanation: there is no reason why someone should write the word sentence with the -s consonant instead of the -c consonant. The original verb comes from Latin and French and we have to look at its roots while spelling. The mistake may occur due to pronunciation (like many other errors), but the only correct form is sentence, not sentense.

Incorrect spelling

Incorrect spelling