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Alternative clues for the word nsf

• Stamp for hot checks
• Univ. grant source
• Fed. grant giver
• Initials on a bounced check
• Agcy. that supports research in economics and geology
• Check prob
• Abbr. that may denote worthlessness
• "Where Discoveries Begin" govt. agency
• Bank abbr. meaning "overdrawn"
• Letters on a bounced check