The Spanish word 'ubre', meaning 'udder', comes directly from the Latin word 'uber', which also meant 'udder'. This is a straightforward inheritance where the Latin 'b' sound was preserved in Spanish, though the spelling changed from 'uber' to 'ubre' to match Spanish phonological patterns.

There aren't many common Spanish words that are etymologically related to 'ubre', as this is a fairly specific anatomical term that has maintained its original form and meaning from Latin.

While not immediately obvious, the English word 'exuberant' is actually related to 'ubre'. It comes from Latin 'exuberare' meaning 'to be abundant or prolific', which was formed from 'ex-' (out) + 'uber' (udder), literally referring to the abundance of milk from an udder. Over time, 'exuberant' evolved to mean generally abundant, and then took on its modern meaning of energetic or joyfully unrestrained.