Yes, stake is a Scrabble word!

Verb

1. Put at risk

2. Place a bet on

3. Mark with a stake

4. Tie or fasten to a stake

5. Kill by piercing with a spear or sharp pole

Noun

1. (law) a right or legal share of something; a financial involvement with something

2. A pole or stake set up to mark something (as the start or end of a race track)

3. Instrument of execution consisting of a vertical post that a victim is tied to for burning

4. The money risked on a gamble

5. A strong wooden or metal post with a point at one end so it can be driven into the ground