Proto-Slavic *ǫglь

→ Belarusian вугаль (inherited)

→ Bulgarian въглища (inherited)

→ Bulgarian въглен (inherited)

→ Bulgarian въгъл (inherited)

→ Czech uhlí (derived)

→ Czech uhel (inherited)

→ Old Church Slavonic ѫгль (inherited)

→ Macedonian јаглен (inherited)

→ Polish węgiel (inherited)

→ Polabian vǫďėl (inherited)

→ Russian уголь (inherited)

→ Serbo-Croatian угаљ (inherited)

→ Serbo-Croatian ugalj (inherited)

→ Serbo-Croatian ugljen (inherited)

→ Serbo-Croatian угљен (inherited)

→ Slovak uhlie (inherited)

→ Slovene ogel (inherited)

→ Albanian hovol (cognate)

→ Ukrainian вугілля (inherited)