The Spanish word 'carita' means 'little face' and is formed by combining two elements: the noun 'cara' (meaning 'face') and the diminutive suffix '-ita'. The base word 'cara' can be traced back to Latin 'cara' meaning 'face', which ultimately comes from Ancient Greek 'κάρα' (kara) meaning 'head' or 'face'.

The diminutive suffix '-ita' is a very common and productive suffix in Spanish that adds the meaning of 'small' or 'little' to nouns, often with an affectionate connotation. When added to 'cara', it creates 'carita' - literally meaning 'little face', often used endearingly.

The most obvious related Spanish word is 'cara' meaning 'face', which is the base word from which 'carita' is derived. 'Cara' is a very common word in Spanish that appears in many expressions, such as 'cara a cara' (face to face) and 'dar la cara' (to face up to something).

While English doesn't have many common words directly related to 'carita' or 'cara', there are some technical terms derived from the same Greek root 'κάρα' (kara). For example, 'cephalic' (relating to the head) and 'encephalon' (the brain) come from this same Greek root, though they took a different path through scientific Latin rather than through common speech.