• fiantism,
• viantism,
• biantism,
• hiantism,
• yiantism,
• tiantism,
• guantism,
• gjantism,
• gkantism,
• goantism,
• g9antism,
• g8antism,
• gizntism,
• gyantism,
• gigatism,
• gigantism,
• Giantasim,
• Geyantism,
• Jiantism,
• Jigantism

• giantess,
• giant clam,
• giant star.

The adjective form of the word "giantism" is "gigantic".

The plural of the "giantism" can be the "giantisms".

The singular of the "giantism" can be the "giantism".