unonym

Any word which just has a one-letter change from another word.

Etymology: Unus-Latin-one + onym-greek-name

"Sam Spam" is not a pun but a unonym, adding just an "p" to the second word.

by Jonathan Sagnella February 16, 2006

Unonymous

A state in which everyone present has a shared opinion on a subject, but nobody openly admits it.

After an awkward silence, it was obvious that the chums had come to a unonymous decision regarding what to do with the corpse.

by Tom Rolfe October 31, 2007

A noxious idea or act that everyone agrees with, but that no one has the guts to openly agreeing with.

Those frat boys were unonymously racist and biggoted.

by AZo September 7, 2005

The Clever Cleaver brothers are famous for having a unonymous name.