Dayfly and Day-fly

Dayfly noun - Slender insect with delicate membranous wings having an aquatic larval stage and terrestrial adult stage usually lasting less than two days.

Day-fly and dayfly are semantically related. In some cases you can use "Day-fly" instead a noun "Dayfly".

Dayfly and day-fly are semantically related. Sometimes you can replace term "Dayfly" with "Day-fly", this terms are similar.