A Bowline with the loop cinched closed makes a decent stopper knot

Simple Ways to Tie a Stopper Knot: 7 Steps (with Pictures)

Three Useful Beginner Knots Everyone Should Learn to Tie - Outward

Risk of Yosemite Bowline Knot

Knots vs. Hardware – The Ultimate Hang

How to Tie a Running Bowline? Video Instructions, Uses & Tips

Bowline Knot How to tie a Bowline Knot using Step-by-Step

10 essential knots you ought to know! - Hammock Universe Canada

Knot tying

Simple Ways to Tie a Stopper Knot: 7 Steps (with Pictures)