The best replacement for embargo is boycott.

The best alternatives to embargo are rated as following:
★★★★★  boycott
★★★★  floorfilla
★★★★  blockade
★★★  hipoteca
★★★  sanctions
★★★  floorfilla techno clash
★★★  sanction
★  no obstante
★  torment
★  restrictive trade sanctions

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Speaking about embargo, one probably shouldn't forget about cuba obama.

Other search terms related to embargo and their ratings are:
★★★★★ cuba obama
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embargo
boycott
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