Irrenglar plural forms:
man.....men
foot.....feet
tooth....teeth
ox.....oxen
child.....children
mouse.....mice
(a)Plural froms of compound nouns:
Major-General.....Major-Generals
Stepfather.....Stepfather
father-in-law.....father-in-law
passer-by.....passers-by
man-servant.....men-servant

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