5-letter words ending in OO may be easy in structure but hold a certain enchant in their everyday use and fine distinctions. These words might be used in puzzle games. Players of Wordle and others like these games commonly use 5 letter words that start with “K”. I searched out these words.

Oater	Oaken	Oared	Oasis
Obang	Obits	Obeys	Obeah

Phoma	Phone	Phoca	Peony
Peons	Phora	Phony	Phono

Doggo	Abaco	Abako	Abilo
Ebano	Fango	Facto	Falco

Wazoo	Pocks	Phoca	Peony
Unbox	Voxel	Phony	Bacao