As nouns the difference between bush and walkabout
is that bush
is (horticulture) a woody plant distinguished from a tree by its multiple stems and lower height, being usually less than six metres tall; a horticultural rather than strictly botanical category
can be (archaic) a tavern or wine merchant or bush
can be rural areas, typically remote, wooded, undeveloped and uncultivated or bush
can be (baseball) amateurish behavior, short for "bush league behavior" or bush
can be a thick washer or hollow cylinder of metal (also bushing) while walkabout
is (australian aboriginal) a nomadic excursion into the bush, especially one taken by young teenage boys in certain ancient-custom honoring tribes.
As a verb bush
is to branch thickly in the manner of a bush or bush
can be to furnish with a bush or lining.
As a adjective bush
is the noun "bush", used attributively or bush
can be (colloquial) not skilled; not professional; not major league.
As a adverb bush
is (australia) towards the direction of the outback.