guppy — a small, freshwater topminnow, Poecilia reticulata, often kept in aquariums.
puppy — a young dog, especially one less than a year old.
Three-syllable rhymes
hush puppy — a small, unsweetened cake or ball of cornmeal dough fried in deep fat.
mud puppy — any of several often large, aquatic salamanders of the genus Necturus, of eastern North America, having bushy, red gills and well-developed limbs.
