The phrase "gave alibi" can be replaced with a number of different phrases or synonyms depending on the context of the sentence. For example, you could say "provided an excuse," "offered an explanation," "made a justification," or "presented a defense." Other possible synonyms include "proffered a story," "produced a cover-up," "fabricated an account," or "spun a tale." Some of these synonyms imply a degree of deceit or dishonesty, while others suggest a more legitimate attempt to explain or justify one's actions. Regardless of the synonym chosen, it is important to ensure that the meaning and context of the sentence remains clear and accurate.