Unscramble Letters Vowel Swap Plurals ScrambleOnline version Unscramble singulars whose plurals swap vowels. by Arnab Biswas 1 An adult male human. N M A 2 An adult female human. A M W N O 3 A large waterfowl with a long neck and webbed feet. G S E O O 4 A dental structure in the mouth used for biting and grinding. T T O H O 5 The lower limb segment used for standing and walking. O O T F 6 A small nocturnal rodent with a pointed snout and long tail. U O M S E 7 A tiny parasite that clings to hair or feathers. U S E O L 8 A small cube with numbered faces used to generate random results in games. I E D