Nouns

(n)hart, staga male deer, especially an adult male red deer
(n)stagadult male deer

Verbs

(v)stagattend a dance or a party without a female companion
(v)denounce, tell on, betray, give away, rat, grass, shit, shop, snitch, staggive away information about somebody“He told on his classmate who had cheated on the exam”
(v)spy, stag, snoop, sleuthwatch, observe, or inquire secretly