1. Easily forgotten

See also: unmemorable

Antonym: unforgettable

• heliogram
• heliograph
• heliographic
• heliogravure
• heliolatry
• heliometer
• heliopause
• heliophila
• heliopsis
• Helios
• heliosphere
• heliostat
• heliotherapy
• Heliothis
• heliothis moth
• Heliothis zia
• heliotrope
• heliotropic
• heliotropism
• heliotype
• Heliozoa
• heliozoan
• helipad
• heliport
• Helipterum