1. A name of various inflammable substances, such as naphtha, petroleum, and asphalt.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• vitamen,
• butumen,
• bitument,
• betueen,
• bittien,
• bitchmen,
• bitmen,
• bitumin,
• biten,
• betuwen,
• bithumen,
• vitimen,
• bituemen,
• vitemen,
• bitween,
• betuen,
• tumen,
• autumen,
• batemen,
• bitumem

• bituminise,
• bitten,
• bituminoid,
• bitumenoid,
• bituminize,
• bituminous.

The adjective form of the word "bitumen" is "bituminous".

The plural of the "bitumen" can be the "bitumens".

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