The best replacement for have is had.

The best alternatives to have are rated as following:
★★★★★  had
★★★★★  has
★★★  got
★★★  of
★★  has grammar
★★  have got
★  get
★  have not
★  has plural
★  had grammar
★  did
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Your alternative for have is not listed? Suggest!
Speaking about have, one probably shouldn't forget about past tense.

Other search terms related to have and their ratings are:
★★★★★ past tense
★★★★ past participle
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have
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