User:Erutuon/PoS headers

Probably valid PoS headers: Abbreviation Acronym Adjective Adnominal Adverb Affix Ambiposition Article Circumfix Circumposition Classifier Clitic Combining form Conjunction Contraction Counter Definitions Derived terms Determinative Determiner Diacritical mark Enclitic Gerund Idiom Infinitive Infix Initialism Interfix Interjection Kanji Letter Ligature Logogram Noun Number Numeral Numerals Participle Particle Phrase Postposition Postpositional phrase Prefix Prenoun Preposition Prepositional phrase Prepositional pronoun Preverb Pronoun Proper noun Proverb Punctuation mark Romanization Root Stem Suffix Syllable Symbol Verb Verbal noun

Hand-optimized regex for headers with more than 20 occurrences: