Found an interesting post

G Γ Ш

So I collected few more instance from Unicode table

Ĝ ĝ Ğ ğ Ġ ġ Ģ ģ Ŵ ŵ Ɠ ɠ ɡ ɢ ɯ ɰ
ʃ ʬ Γ Ϣ ϣ Г Ш Щ Ѡ ѡ Ѱ ѱ Ѽ ѽ Ѿ ѿ Ԍ ԍ Բ ա պ ვ ლ ᄈ
Ḟ ḟ
Ḡ ḡ Ẁ ẁ Ẃ ẃ Ẅ ẅ Ẇ ẇ Ẉ ẉ
ὠ ὡ ὢ ὣ ὤ ὥ ὦ ὧ ℉ ℊ ℐ Ⅎ ℱ ∮

Be creative!