Answer:

omni

Answer	Crossword Clue
OMNI	Potent start?
OMNI	Present opener?
OMNI	Science journal

OMNI	Science magazine
OMNI	Science monthly
OMNI	Former Atlanta arena
OMNI	Present opening
OMNI	Science mag
OMNI	Old science magazine
OMNI	Prefix for present
OMNI	Word form for "all"

OMNI	Present leader?
OMNI	Old Dodge
OMNI	Prefix with present
OMNI	Texas-based hotel chain
OMNI	Bus starter
OMNI	Old Atlanta arena
OMNI	Forward-looking mag
OMNI	Old home to the Hawks

OMNI	Present starter
OMNI	Starter meaning "all"
OMNI	Prefix for everything
OMNI	Upscale hotel company
OMNI	Prefix on present
OMNI	Luxury hotel chain
OMNI	High-end hotel
OMNI	Prefix for everything?

OMNI	Dodge of yore
OMNI	Prefix on "present"
OMNI	Upscale hotel chain
OMNI	Bygone Dodge
OMNI	Discontinued Dodge
OMNI	Everything's start?
OMNI	Present starter?
OMNI	Old Dodge model

OMNI	Defunct mag that featured a "UFO Update"
OMNI	Prefix meaning "all"
OMNI	... Coliseum (former Atlanta landmark)
OMNI	... Air International (Tulsa-based airline)
OMNI	Book of Mormon character