Romp
Part of speech: verb
Definition: To play about roughly, energetically or boisterously. (Often used with down) To press forcefully, to encourage vehemently, to oppress. To win easily. To engage in playful or boisterous sex.
Part of speech: noun
Definition: A period of boisterous play, a frolic. A bout of playful or boisterous sex.
Tomboy
Part of speech: noun
Definition: A girl who behaves in a typically boyish manner.
Example sentence: 'Red Dawn' was really the most fun I ever had making a movie, because I love Westerns, and I love the idea of being a tomboy, and riding horses and shooting guns.