The Spanish word 'futuro' (meaning 'future') comes from the Latin word 'futurus', which meant 'about to be' or 'future'. This Latin word was formed from 'fu-', which was the perfective stem of the Latin verb meaning 'to be'. The development from the concept of 'being' to 'what will be' shows how language evolved to express the concept of future time.

Some related Spanish words include 'futurista' (futuristic), 'futurismo' (futurism), and 'futurología' (futurology). These words all share the same root and relate to concepts of the future and what is yet to come.

The English word 'future' is a direct cognate of Spanish 'futuro', as both come from the same Latin source 'futurus'. Other related English words include 'futuristic', 'futurology', and 'futurism'. The similarity between the Spanish and English words makes this an easy vocabulary item for English speakers to remember.