The Spanish word 'escatología' is interesting because it actually has two distinct meanings with two different etymological origins, both coming from Ancient Greek. The first meaning, 'study of last things' or 'end times', comes from combining the Greek 'eschatos' (meaning 'last' or 'final') with '-logia' (meaning 'study of'). This combination first appeared in New Latin as 'eschatologia' before entering Spanish.

The second meaning, 'study of excrement', derives from the Greek word 'skor' (meaning 'excrement') and its genitive form 'skatos', combined with the same suffix '-logia'. This created a scientific term for the study of fecal matter.

Some related Spanish words include 'escatológico' (eschatological or scatological) and 'escato-' as a prefix in scientific terms. However, these are generally technical or academic terms rather than common vocabulary.

English speakers might recognize the related word 'eschatology' (the study of end times or final things) and 'scatological' (relating to excrement or obscene language). The prefix 'eschato-' appears in other academic English words related to final things or end times, while 'scato-' appears in scientific terms related to excrement.