justification, necessity, occasion, reason, wherefore,how come
Additional answer
Apart from 'wherefore' and 'how come' these are not synonyms for why, because why is a preposition and the other examples are nouns.
The Spanish word for "why" is "por qué", literally translated as "for what".
It can be used as an adverb and a noun.
reason
They are synonyms.
Synonyms
Relative and kin are synonyms.
They are synonyms.
synonyms
Are there synonyms for washable
Synonyms for Brake:AnchorBlockConstraintDecelerateDeterrentHaltHindranceObstacleRestraintStop
Synonyms for Brash:ArrogantBoldBrazenCheekyCockyDisrespectfulFlagrantHastyHotheadedImpulsiveMadcapRudeTactlessThoughtlessUntactful
There are no synonyms for pavement.
The synonyms for upon is on
what is the nativeof synonyms
what is a synonyms for notice