mismate

Phyllie, don't mismate; those that do regret it.

From Tobogganing on Parnassus by Franklin P. (Franklin Pierce) Adams

Of the 1975 comedy-drama "Lucky Lady," for example, he wrote that it was a "cynical, vulgar, contrived, mismated, violent, uneven and uninteresting disaster."

From Los Angeles Times ● Nov. 17, 2014

Unaware or uninterested that the two are mismated, the matchmakers give their efforts much more sense of ravishment than of matrimony.

From Time Magazine Archive

There the miracle occurred: Minne and Antoine found they were not so mismated after all.

From Time Magazine Archive

Under the old Army method of pushing people around on paper, too often men and jobs were mismated.

From Time Magazine Archive

It is quite as easy to arrange them in this way as to gather in an ill-assorted, mismated collection.

From The Complete Home by Clara E. (Clara Elizabeth) Laughlin

The similar drug diethylstilbestrol, which Yale researchers are finding equally effective, has been used by veterinarians for years to treat mismating in animals.

From Time Magazine Archive

It was a most queer mismating, for the man was plain, sincere and honorable, and she was almost everything else.

From Little Journeys to the Homes of the Great Philosophers, Volume 8 by Elbert Hubbard

M. Arouet pater did not marry until his mind was mature, so that he might avoid the danger of a mismating.

From Little Journeys to the Homes of the Great Philosophers, Volume 8 by Elbert Hubbard

However, they said very little about this mismating to any of their acquaintances, though sometimes Steve would look at James’s wife and sigh, and James would look at Steve’s wife and do the same. 

From Life's Little Ironies by Thomas Hardy

Show how this transformation makes the mismating of Titania with Bottom more gross and obvious to the audience; also how this is the next direct effect of Oberon's revenge.

From Shakespeare Study Programs; The Comedies by Charlotte Endymion Porter