Nouns

(n)peg, noga wooden pin pushed or driven into a surface
(n)peg, pinsmall markers inserted into a surface to mark scores or define locations etc.
(n)pin, peg, stickinformal terms for the leg“fever left him weak on his sticks”
(n)peg, wooden leg, leg, peglega prosthesis that replaces a missing leg
(n)pegregulator that can be turned to regulate the pitch of the strings of a stringed instrument
(n)peg, pin, thole, tholepin, rowlock, oarlocka holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing

Verbs

(v)nail down, nail, pegsucceed in obtaining a position“He nailed down a spot at Harvard”
(v)pegpierce with a wooden pin or knock or thrust a wooden pin into
(v)peg, peg downfasten or secure with a wooden pin“peg a tent”
(v)pegstabilize (the price of a commodity or an exchange rate) by legislation or market operations“The weak currency was pegged to the US Dollar”