• heartside,
• geaviside,
• beaviside,
• neaviside,
• jeaviside,
• ueaviside,
• yeaviside,
• hwaviside,
• hsaviside,
• hdaviside,
• haviside,
• haeviside,
• heavisside,
• heavyside,
• Cerviside,
• heaveiside,
• hevside,
• hevidside,
• heaveside,
• hevisside

• heavyset,
• revised,
• heaves,
• heaviest,
• Devised.

The adjective form of the word "heaviside" would be "Heaviside's" or "Heavisidian". This refers to the English mathematician and physicist Oliver Heaviside or his mathematical contributions.

The plural form of the word "heaviside" is "heavisides".

The singular form of the word "heaviside" is "Heaviside". It remains the same in both singular and plural forms.