re·fresh·er 
(rĭ-frĕshər)
(rĭ-frĕshər)n.
1. One that refreshes.
2. Instruction that serves to reacquaint one with material previously studied or to bring one's knowledge or skills up to date.
- Polynices
- polynomial
- polynuclear aromatic hydrocarbon
- polynucleotide
- polynya
- polyomavirus
- polyp
- polyparium
- polypary
- Polypay
- polypeptide
- polypetalous
- polyphagia
- polyphagian
- polyphagous
- polyphagy
- polyphagy
- polypharmacy
- Polyphemus
- polyphemus moth
- polyphenol
- polyphenolic
- polyphone
- polyphonic
- polyphonically