People describe certain terms as a portmanteau of two other words, e.g. "fediverse is a portmanteau of federation and universe".
This of course assumes that everyone knows what "portmanteau" means.
Portmanteau is itself a portmanteau, derived from King Henry VIII's porter Manfield Touse, who invented a two compartment travelling chest for HRH - Henry being known as a neat freak liked to keep his dirty underwear separate from his fresh underwear when travelling.