Grammatical term for words like ああ, おや, まあ that express emotion or call attention. Often contrasted with 感動詞, which is a broader category in some grammar frameworks.
See also: 感動詞 (かんどうし)
Words like 'aa' and 'oya' are classified as interjections.
General use for any exclamatory word or utterance, not limited to grammatical classification.
She let out an exclamation of surprise.
感動詞 is a broader term that can include interjections, greetings, and other emotive words, while 感嘆詞 is more strictly limited to exclamatory interjections.
Standard modern spelling.
Contains outdated kanji 歎; rarely used in modern writing.
Compound of 感嘆 (kantan, 'admiration; exclamation') + 詞 (shi, 'word; part of speech'). The kanji 歎 is an older variant of 嘆.