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English oak
← Old English āc (inherited)
← Old English ǣċ (cognate)
← Danish eg (cognate)
← German Eiche (cognate)
← Middle English ook (inherited)
← Middle English oke (mention)
← Middle English aik (mention)
← Middle English ake (mention)
← West Frisian iik (cognate)
← Proto-Germanic *aiks (inherited)
← Proto-West Germanic *aik (inherited)
← Ancient Greek αἰγίλωψ (cognate)
← Proto-Indo-European *h₂eyǵ- (root)
← Proto-Indo-European *h₂eyǵ- (derived)
← Latin aesculus (cognate)
← Lithuanian ąžuolas (cognate)
← Dutch eik (cognate)
← Norwegian eik (cognate)
← Scots aik (cognate)
← Albanian enjë (cognate)
← Swedish ek (cognate)
← Yiddish אייכנבוים (cognate)

→ English one (mention)
→ English oaken (affix)
→ English futtock (mention)
→ English oaks (suffix)
→ English oakleaf (compound)
→ English oaked (suffix)
→ English oaky (suffix)
→ English tanoak (compound)
→ English oaklike (suffix)
→ English oakbark (compound)
→ English oakmoss (compound)
→ English oakling (suffix)
→ English oakwood (compound)
→ English durmast oak (compound)
→ English she-oak (prefix)
→ English oakness (suffix)
→ English Oakville (suffix)
→ English oakware (suffix)
→ English oaklet (suffix)
→ English Oakboy (compound)
→ Cimbrian aicha (cognate)
→ German Eiche (cognate)
→ Persian آچ (cognate)
→ Japanese オーク (borrowed)
→ Latin aesculus (cognate)
→ Luxembourgish Eech (cognate)
→ Lithuanian ąžuolas (cognate)
→ Malagasy oaka (borrowed)
→ Marshallese uuk (borrowed)
→ Norwegian Nynorsk eik (cognate)
→ Pennsylvania German Eeche (cognate)
→ Saterland Frisian Eeke (link)
→ Thai โอ๊ก (borrowed)