armstrong, birdsong, diphthong, furlong, headlong, headstrong, hourlong, monthlong, plainsong, scuppernong, weeklong.
Your query has returned 86 words, which include anagrams of daylong as well as other shorter words that can be made using the letters included in daylong.
The words in this list can be used in games such as Scrabble, Words with Friends, Wordscapes and other similar games.