Feud (noun) عداوت، خاندانی جھگڑا، قبائلی دشمنی

a prolonged and bitter quarrel or dispute.
Example: “his long-standing feud with Universal Pictures”
Synonyms: vendetta, conflict, war, rivalry, hostility, enmity, strife, discord, bad blood
Antonyms: accord, agreement, calm, concord
Momentous (adjective) یادگاری لمحے، بہت اہم

of great importance or significance, especially in having a bearing on future events.
Example: “a period of momentous changes in East–West relations”
Synonyms: important, significant, epoch-making, historic, apocalyptic, headline, fateful, portentous
Antonyms: unimportant, trivial, insignificant