Pup
Part of speech: noun
Definition: A young dog, wolf, fox, seal, shark and some other animals. A young, inexperienced person. Any dog that one believes is cute, regardless of age. A short semi-trailer used jointly with a dolly and another semi-trailer to create a twin trailer.
Part of speech: verb
Definition: To give birth to pups.
Whelp
Part of speech: verb
Definition: to give birth.
Part of speech: noun
Definition: the young of a mammal.an insolent youth.one of several wooden strips to prevent wear on a windlass on a clipper-era ship.a tooth on a sprocket wheel (cf. sprocket, def. 2; cog, def. 1).