Yes, expressions is a Scrabble word!

Noun

1. The feelings expressed on a person's face
2. Expression without words
3. The communication (in speech or writing) of your beliefs or opinions
4. A word or phrase that particular people use in particular situations
5. The style of expressing yourself
6. A group of symbols that make a mathematical statement
7. (genetics) the process of expressing a gene
8. A group of words that form a constituent of a sentence and are considered as a single unit
9. The act of forcing something out by squeezing or pressing