• spenddown,
• pulldown,
• selldown,
• apelldown,
• zpelldown,
• xpelldown,
• dpelldown,
• epelldown,
• wpelldown,
• soelldown,
• slelldown,
• splelldown,
• spelldow,
• spelldownn,
• spelldoun,
• spell down,
• stenddown,
• spelldowne,
• smesedown,
• spelldawn

• splodge,
• Spaulding,
• split down,
• Spalding.

The adjective form of the word "spelldown" would be "spelldownish". However, it is worth mentioning that "spelldownish" is not a commonly used adjective and there may be alternative ways to express the meaning you are looking for.

The plural form of the word "spelldown" is "spelldowns"

The singular form of the word "spelldown" is "spelldown". The word does not change in its singular form.