The Spanish word 'orgasmo' comes from Ancient Greek 'orgasmos' (ὀργασμός), which meant 'swelling' or 'excitement'. This Greek word was formed by combining the verb 'orgao' (ὀργάω), meaning 'to swell with moisture' or 'to be in heat', with the suffix '-asmos' (-ασμός), which was used to form nouns indicating a result or process. The verb 'orgao' itself was related to the Greek noun 'orge' (ὀργή), which referred to 'temperament' or 'anger', showing an ancient connection between emotional and physical states of excitement.

The word 'orgasmo' doesn't have many common etymologically related words in Spanish that would be simpler for students to recognize. However, you might encounter 'orgánico' (organic) in Spanish, which, while following a different semantic development, shares distant roots in the idea of natural processes and physical states.

English speakers can easily recognize the cognate word 'orgasm', which follows the same etymology. Other related English words include 'organ' and 'organic', which, while they've developed different meanings, share the ancient Greek connection to natural processes and physical states. The word 'orgy' is also related, coming from the same Greek root 'orge' and maintaining a connection to intense states of excitement or passion.