Tom was excited to be starting at the local infant school.
The word, 'infant' is already a noun, and can mean a very young child or baby.
An infant could answer this question.
Still just a few months old, the infant was making great progress.
"Infant mortality rates are high in India" "The infant mortality rate is 2 out of every 1000 live births"
My friend Mike is callow, he behaves like an infant child.
I am looking for warm weather clothing for an infant.
Can you use the word concluding in a sentence? Done.
You can use the word Truss in a sentence like this.
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?
Since that is not a word I would not attempt to use it in a sentence.
You just did use the word colonize in a sentence.