Yes, pig is a Scrabble word!

Verb

1. Live like a pig, in squalor

2. Eat greedily

3. Give birth

Noun

1. Domestic swine

2. A coarse obnoxious person

3. A person regarded as greedy and pig-like

4. Uncomplimentary terms for a policeman

5. Mold consisting of a bed of sand in which pig iron is cast

6. A crude block of metal (lead or iron) poured from a smelting furnace