Synonyms of interjection

1 Syllable
oops, rah, pooh, hey, ugh, ah, wow, um, er, boo, ouch, huh, shucks, phew, phooey, psst, oh
2 Syllables
hooray, hello, hurrah, amen, egad, whoopee, ahem, golly, alas, jeepers
3 Syllables
insertions, insertion
4 Syllables
expletive, exclamations, exclamation