Ropes are similar in that they are long and can be placed directly. This is where it gets interesting, however:
We have probably all seen the ball yellow rope. It is looking curly, not lying when you try to roll out and not very strong. It also cannot make a knot mean anything, that node will only unravel faster than you could tie it. If you are looking to buy nylon paracord then you can explore www.theparacordstore.com/nylon-paracord-tack.html.
Their climbing ropes are made for climbing. It was quite easy, but they have a great kernmantle design because it makes them strong, resistant to abrasion and the best part – stretchy.
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If you want an elastic strap, the paracord is what you are looking for. These things are very elastic and they are great for keeping things rolled up when you do not use them to jump from a great height. Paracord also comes in a variety of different diameters so you can find the perfect one for whatever you need to quite easily.
A single braid will have a hollow core and will be flat when you push on it. A double braid but has a braided core which makes it stronger and less likely to kink when you use it.
And then there is the parachute cord, cable 550, so named because it has a minimum breaking strength of 550 lbs. It is made of a braided sheath having up to 9 separate strands woven rope inside. It's powerful, it's durable and it is for military specifications. No wonder they use it when they were heading out of the plane.