el, ell

El or el stands for elevated, as a train set on tracks above the street level--
Here in Philadelphia, "el" stands for "Market-Frankford Subway-Elevated".
Do you want to drive, or take the el?

Ell or ell ( rhymes with "el" ) means an addition to a building, or a wing or room, set at right angles to the main building--
The conference room is in the ell at the back of the building.
They are thinking of adding an ell to the side of the building.

El is also an old-fashioned term for a measure of cloth--
He went to the store to buy an ell of cloth.

Now that you know that, you can say--
"We can take the el downtown to see the ell they are adding to the museum."

Note--"el" or "ell" might also be a way to spell out ( phonetically ) the letter "L"--
It's spelled el ee tee tee ee are.