tent flap(n = noun.artifact) fly, fly sheet, rainfly, tent-fly - flap consisting of a piece of canvas that can be drawn back to provide entrance to a tent;
is a kind of flap
is a part of fly tent

backpacking tent, bell tent, canvas tent, circus tent, cottage tent, field tent, flap, flap down, fly tent, forest tent caterpillar, landing flap, lean-to tent, mountain tent, oxygen tent, pack tent, pocket flap, pop tent, pup tent, pyramidal tent, sealskin tent, shelter tent, sibley tent, tent, tent caterpillar, tent peg, tent stitch, two-man tent, umbrella tent, wall tent