Questions of Greek Grammar

...acutitones having an acute accent on the final syllable having more than one syllable are declined via -ωπος.
ὁ χαρίεις the graceful one, τοῦ χαρίεντος; ὁ εἰς the one, τοῦ ἑνός. Those ending in -εις with more than one syllable are declined via -ντ. Monosyllables are declined via -ν, such as εἷς, ἑνός; and those derived from it, οὐδείς, οὐδενός.
ὁ βοῦς the ox, τοῦ βοὸς, τὸν βόα, and βοῶ, ὦ βοῦ.
ὁ πούς the foot, τοῦ ποδὸς, ὦ πούς. ὁ παῖς the child, τοῦ παιδός.
Those ending in -υς that remain unchanged are declined via a pure -ος, except for πούς, τοῦ ποδός.
ὁ ἕλμινς the tapeworm, τοῦ ἕλμινθος. ὁ τίρυς the Tyrus, τοῦ τίρυθος. Every noun ending in two consonants is declined via two consonants, except for ἅλς salt, ἁλός.
ὁ θώραξ the breastplate, τοῦ θώρακος. ὁ ἅρπαξ the robber, τοῦ ἅρπαγος. Those ending in -αξ are declined via -κ, unless they come from a verb ending in -ζω. Then, they are declined via -γ.
ὁ μύρμηξ the ant, τοῦ μύρμηκος. ὁ βουπλήξ the ox-goad, τοῦ βουπλῆγος. Simple barytone nouns ending in -ηξ are declined via -κ; compound and acutitone nouns are declined via -γ.
ὁ πέρδιξ the partridge, τοῦ πέρδικος; ὁ πέπηξ the frozen one, τοῦ πέπηγος. Those ending in -ιξ are declined via -κ, unless the verb ends in -ζω. Then, they are declined via -γ.
ὁ δίσιυξ the twin-yoked, τοῦ δισύυκος. ὁ ὄνυξ the claw, τοῦ ὄνυχος. Those ending in -υξ naturally preceded by a long vowel, and those that are expressed via two consonants, are declined via -κ; φρὺξ Phrygian, however, is declined via -γ, as φρυγός.
ὁ βὼξ the ox-voice, τοῦ βωκός. ὁ πὼξ the pōx, τοῦ πωκός. Simple nouns ending in -ωξ are declined via -κ, except for ῥὼξ the cleft, ρωγός.
ὁ κύκλωψ the Cyclops, τοῦ κύκλωπος. ὁ μώλωψ the welt, τοῦ μώλωπος. ὁ γύψ the vulture, τοῦ γυπός. Those ending in -ψ are declined via -π.