pentad /penˈtad/

1. A set of five things
2. A period of five years or five days
3. An atom, element or radical with a combining power of five

• worth it
• worthless
• worthlessly
• worthlessness
• worthlessnesses
• worth one's salt
• worth one's weight in gold
• worth one's while
• worths
• worth the whistle
• worth while
• worthwhile
• worthy
• worthying
• wortle
• wortles
• worts
• wos
• wosbird
• wosbirds
• wost
• wot
• Wotan
• wotcha
• wotcher