insure, ensure, assure

Insure or insure ( inn shoor ) means to guarantee against loss--to agree to pay a sum of money in case of injury, death, or financial loss or damage, as to a home or car--
The company refused to insure my classic car.
I called them to see if they would insure our house.
Insurance is the service you buy when a company ( an insurance company ) agrees to insure you--
I want to buy some life insurance.
The insurance will pay for the damage to our house.

Ensure or ensure ( enn shoor ) means to make sure or certain--usually meaning by something that you do--
To ensure best results, shake well before using.
They used a video camera to ensure that safety regulations were followed.

Assure or assure ( uh shoor ) means to state positively, or with confidence--
I assure you that I didn't mean to be rude.
I would like to assure our customers that our company is very concerned about the problem.
Assure may also mean to guarantee,  secure or confirm--
This will assure you a place next term.
Assurance or assurance means the act ( a noun--thing or idea ) of stating something with confidence--
You have my assurance that we will solve the problem.
He offered his assurance that no one would be fired.
Reassure or reassure means to offer comfort ( in words) , usually by convincing someone of something--
She was upset, but his kind words served to reassure her.
The team lacked confidence, but the coach's pep talk reassured them.

Now that you know that, you can say--
"I would like to assure everyone that we are doing our best to ensure that we can insure all of you against floods and hurricanes."

Note--ensure and assure are often used to mean insure. Some dictionaries list them as synonyms, but this is confusing. In the United States, currently, only "insure" is used to mean insurance that you buy--
To ensure peace of mind, I can assure you that it would be best to insure your property."
Note # 2--reinsurance is a technical word used by insurance companies--
A reinsurance company sells insurance to other insurance companies.
Note # 3--self-assured means very confident--
They hired him because he seemed such a self-assured young man.
Note # 4--self-insured means someone has deposited money in a bank account for the purpose of insurance claims, instead of buying an insurance policy. This is legal in some states with financial responsibility laws. If the self-insured person hits a car, the damages are paid out of this account, instead of through an insurance policy--
Pleas send a copy of the insurance policy or proof that you are self-insured.
Note # 5--"as sure" ( az shoor ) , two words, means equally as positive, or having as much confidence in--
I am as sure of the outcome as if I were watching it myself.
He was not as sure of the answer after hearing the other responses.
Note # 6--"ashore" ( uh shoor ) means on land, to somemone on a ship or boat--
"All ashore that's going ashore!"
Not to be confused with "a sure" ( uh shoor )--
This is a sure thing! Really!