Nouns

(n)juncture, occasionan event that occurs at a critical time“at such junctures he always had an impulse to leave”, “it was needed only on special occasions”
(n)affair, occasion, social occasion, function, social function, social gathering, social affaira formal or official social gathering or ceremony of people“the party was quite an affair”, “an occasion arranged to honor the president”, “a seemingly endless round of social functions”
(n)reason, ground, occasiona rational motive for a belief or action“the reason that war was declared”, “the grounds for their declaration”
(n)occasionthe time of a particular event“on the occasion of his 60th birthday”
(n)occasionan opportunity to do something“there was never an occasion for her to demonstrate her skill”

Verbs

(v)occasiongive occasion to