Yes, foils is a Scrabble word!

Verb

1. Enhance by contrast

2. Hinder or prevent (the efforts, plans, or desires) of

3. Cover or back with foil

Noun

1. A piece of thin and flexible sheet metal

2. Anything that serves by contrast to call attention to another thing's good qualities

3. A device consisting of a flat or curved piece (as a metal plate) so that its surface reacts to the water it is passing through

4. Picture consisting of a positive photograph or drawing on a transparent base; viewed with a projector

5. A light slender flexible sword tipped by a button