Taxonomy vs Serkland - What's the difference?

taxonomy | serkland |

As a noun taxonomy

is the science or the technique used to make a classification.

As a proper noun serkland is

(historical|in translations of norse sagas and runestones) the abbasid caliphate.

Serkland vs Abbasid - What's the difference?

serkland | abbasid |

Serkland is a see also of abbasid.