Non-inflectable words (体言(たいげん))

Sino-japanese words (漢語(かんご))

Two-character kanji compounds (二字熟語(にじじゅくご))

Native Japanese words (和語(わご))

Inflectible words (用言(ようげん))

I-adjectives (形容詞(けいようし))

Verbs (動詞(どうし))