lunacy /looˈnə-si/

1. A form of insanity once believed to come with changes of the moon
2. Insanity generally
3. Extreme folly

lunatic /looˈnə-tik/ adjective

Affected with lunacy

1. A person so affected
2. A madman or madwoman

lunatic asylum noun

A former, now offensive, name for a psychiatric hospital

lunatic fringe noun

The more nonsensical, extreme-minded, or eccentric members of a community or of a movement

• debouch
• debouched
• debouches
• debouching
• debouchment
• debouchments
• debouchure
• debouchures
• Debrett
• Debrett's Peerage
• debrief
• debriefed
• debriefing
• debriefings
• debriefs
• debris
• debruised
• debs
• debt
• debt bondage
• debted
• debtee
• debtees
• debt of honour
• debt of nature