Irregular Nouns

This thesaurus file will enable dtSearch to handle plurals of words that stemming rules may not, for example in English woman - women, foot - feet, goose - geese, child - children.


The normal plural of English nouns ends in -(e)s, for example dog, dogs; bush, bushes. Nouns which end in a consonant plus -y change the -y to -ies, for example pony, ponies; lady, ladies. Finally, some nouns that end in -f(e) change the -f to -ve in the plural, for example calf, calves; knife, knives. When searching for such nouns in dtSearch always keep English stemming turned on to ensure that a search will always find documents containing either the singular or plural form of the noun.



There is a small group of nouns  for which the plural form involves a vowel change rather than a change in the word ending, dtSearch stemming alone will not find these, some common words with irregular plurals of this kind are: man, men; foot, feet; tooth, teeth.


Danish, Dutch, Norwegian and Swedish

Just as with English and other Germanic languages* the Danish, Norwegian and Swedish plural indefinite forms of the words man (mande, mann, man), foot (fod, fot, fot) and tooth (tand, tann, tand) are irregular.  (Note that Dutch plural forms of these words use a regular -en suffix to form the plural: man - maanen; voet - voeten, tand - tanden).


dtSearch Danish, Dutch, Norwegian and Swedish stemming rules will handle the majority of regular plurals and some irregular forms. The thesaurus sample noun files will improve the recall of irregular nouns in these languages.



Language Number of  nouns in sample file








Swedish 31