dear, deer

Dear or dear modifies ( describes ) something or someone associated with feelings of affection or love--
Few people still use the salutation "dear sir or madam" in letters.
I'm writing a poem. What rhymes with "dear" ?
"Dear John...."
Hang on for dear life.
"Frankly, my dear, I don't give a damn."
Dear is also an old-fashioned term for expensive or costly--financial or mental--
I bought chicken because beef was too dear.
The confession cost him dearly.

Deer or deer ( rhymes with dear ) means the creature that lives in the forest--Bambi, or another of the same species--
A deer ran right in front of our car.
Watch for "deer crossing" signs.

Now that you know that, you can say--
"My dear, you just nearly ran over a deer."

Note--the plural form ( more than one ) of "deer" is "deer". One deer. Two deer. Like fish. Or sheep.