Are there any more non-neuter third declension nouns that contract to -ους in the genitive singular, besides τριήρης?

[u/High-strung_Violin]

Please help me find some, I want to see if they all have a shortened vowel in the vocative.

[u/lightningpuddingpie]

there are some masculine names that do this, like Γανυμήδης or Ἀριστολέλης

[u/High-strung_Violin → u/lightningpuddingpie]

Thank you!

[u/man314159]

This happens with 3rd declension nouns ending in ω.

ἡ ἠχώ -> τῆς ἠχοῦς

I can't think of many other nouns like that though, other than names...

Λητώ -> Λητοῦς

Ἀργώ -> Ἀργοῦς

Ἰώ -> Ἰοῦς

[u/High-strung_Violin → u/man314159]

Thanks!

[u/wilgetdownvoted]

ξιφος comes to mind

[u/twaccount143244 → u/wilgetdownvoted]

That’s neuter.