Even longer ones!
A faithful reader (PW) wonders what the longest English chimera word is. He came up with acUTE:
Thanks, PW!
And because upper and lower case letters are different shapes, it turns out that acUtE also works:
While I haven’t done an exhaustive search, I did come up with another 5 letter one: mUngE, and one 6 letter one: stUcco. You can see what they look like on the Chimera words web page I made.
I’ll leave you with one more possibility. It’s a single English word, but borrowed from French, and it makes two full chimeras, not one. You be judge whether it should count.
entr’actE