tense, tents, intense, in tents

Tense or tense means strained or stretched taut--
The cord was so tense that it snapped.
She was tense, and her nerves were frayed.

Tense is also a  grammar term, meaning the form a verb ( action word ) takes to express the past, present, or future--when the action was begun, or when it ended--
The verb "to be" has an irregular past tense--was or were.
The future tense of "to be" is "will be".

Tents or tents ( rhymes with tense ) is the plural of "tent", meaning a canvas or nylon portable dwelling--
They pitched their tents at the edge of the woods.
He bought some army surplus tents, for camping next summer.

Intense or intense ( one word )  means to a strong or extreme degree, literally or figuratively--
His anger was so intense that he was speechless.
The sunlight was so intense that it hurt his eyes.
The intense heat made them all feel tired.

Intents ( one word )  is usually only found in the familiar expression "all intents and purposes", meaning for all practical purposes--
His work is now useless, for all intents and purposes.

In tents ( two words ) means within or inside of a canvas or nylon portable dwelling--
We rented cabins this year. Next year we plan to camp in tents.
The army camps in tents.

Now that you know that, you can say--
"Next time we won't camp in tents. The intense heat made everyone in the tents feel tense and tired. For all intents and purposes, the tents were a nightmare."

Note--"intent" means purpose or goal--
He made his intent to rob the bank clear when he brandished a weapon.
Intent also means fixed on or determined--
He seems intent on finding a new job; he's fed up with this one.

Note # 2--"tens" ( tenz) means the number column used to add up figures that are multiples of ten--
Make sure to keep the ones in the ones column and the tens in the tens column.
"Tens" may also be the plural of ten-dollar bills--
I'd like that in fives and tens, please.
I'd like that in tens and twenties, please.