Similar words
píldora
píldora often specifically refers to "the pill," birth control; pastilla is more general, any pill or tablet.
Similar in other languages
Portuguese
comprimido
comprimido is the Portuguese word for the same thing — both mean "pill."
Portuguese
pílula
pílula is the Portuguese word for the same thing — both mean "pill."
Practice
1 What does pastilla mean?
pill
2 Fill the gap: Tomo una ___ cada día.
Full sentence: Tomo una pastilla cada día. (I take a pill every day.)
3 Which fingerprint chart matches pastilla?
pastilla: neutral register, common frequency, general domain, neutral connotation.