His mental instability increased with age.
The word instability means "imbalance" or "inconstancy." Some words which could be substituted if instability was used in a sentence could be "hesitation" or "insecurity."
His heresy misled many, and was the cause of much instability in the organisation.
You can use the word Truss in a sentence like this.
Can you use the word concluding in a sentence? Done.
Just use it! Or do you mean, can you use the word beheld in a sentence.
How do you use the word decibel in a sentence?What is decibel used for?
You can use the word Terrorist in a sentence as " Muslims are not terrorist ".
You just did use the word colonize in a sentence.
Since that is not a word I would not attempt to use it in a sentence.
use the word puzzlement in a sentence
can i get a sentence for the word abhorrence