From the Latin omni- meaning 'all, everything', we derive the word omnibus, 'to carry every (one)', which usage has shortened to our current 'bus'.
omnivorous.
Oldsmobile (Dodge) Omni Odyssey (Honda)
ominiroom
omnivore
There are many words that begin with the prefix "omni." In addition to the ones you mentioned there are "omnidirectional," "omnivore, and "omnisexual."
The prefix of all or everywhere is Omni. Omni is a Latin word and it is a combining form of the word all.
all
Omni tires are made by Omni United in Singapore. I have no reports of whether they are good or not.
The Omni Group was created in 1989.
Omni - magazine - was created in 1978.
Omni - magazine - ended in 1998.
Omni Coliseum was created in 1972.