[shakow]

"Bonjours" doesn't exist, and "salutations" is a tad quirky, but OK in informal settings, especially when addressing many people at once.

[tasogare]

No, bonjours exists (it's simply the plural form of bonjour used as a noun) but the contexts it is used are very very infrequent so it's weird to find it in that list.

[a1369209993]

Compare "I said my hellos and goodbyes." in English. It's definitely a word, just so uncommon as to be largely irrelevant in most practical contexts.

[toxik]

It's very clearly semantically related though? I don't understand the complaint here.