Synonyms of greeting

1 Syllable
ciao, note, hi, nod, card, hail, blow
2 Syllables
yeses, hello, regards, letter, respects, rumble, highball, address, howdy, salaam
3 Syllables
accosting, compliments, heralding, ovation, receptions, aloha, salute, reception, attention, notice
4 Syllables
testimonial, how-do-you-do, compellation, salutation, acknowledgment