gressorial

As adjectives the difference between gressorial and ambulatory

is that gressorial is (zoology) adapted for walking while ambulatory is of, relating to, or adapted to walking.

As a noun ambulatory is

the round walkway encircling the altar in many cathedrals.

As a noun terms

is .

As an adjective gressorial is

(zoology) adapted for walking.

In zoology terms the difference between gressorial and cursorial

is that gressorial is adapted for walking while cursorial is having legs fitted for running.