Yes, mother is a Scrabble word!

Verb

1. Care for like a mother

2. Make children

Noun

1. A woman who has given birth to a child (also used as a term of address to your mother)

2. A stringy slimy substance consisting of yeast cells and bacteria; forms during fermentation and is added to cider or wine to produce vinegar

3. A term of address for an elderly woman

4. A term of address for a mother superior

5. A condition that is the inspiration for an activity or situation