• signof,
• signofe,
• aignoff,
• zignoff,
• xignoff,
• dignoff,
• eignoff,
• wignoff,
• sugnoff,
• sjgnoff,
• skgnoff,
• sognoff,
• s9gnoff,
• s8gnoff,
• sifnoff,
• signofg,
• signofff,
• signofef,
• signofp,
• signofph

• signboard,
• signified,
• signify,
• signifier,
• signpost,
• sign over,
• sign off.

The adjective form of the word "signoff" is "signed-off".

The plural form of the word "signoff" is "signoffs"

The singular form of the word "signoff" is "signoff" itself. It does not change in its singular form.