Expanse: a large, open area of land, water, or sky (Cambridge)
Stretch: a continuous area of land or water (Cambridge)
Expanse: a very large area of water, sky, land etc (Longman)
Stretch: an area of land or water, especially one that is long and narrow (Longman)
What is the difference between an expanse of sea and a stretch of sea? How do I know when to use which?
Does "expanse" mean the sea stretches out as far as your eyes can reach?
Does "stretch" mean an area of sea that is narrow and long, which is enclosed and bounded by the land?