As adjectives the difference between low and lowish

is that low is in a position comparatively close to the ground while lowish is somewhat low, sort of low, low to a degree.

As a noun low

is something that is low; a low point.

As an adverb low

is close to the ground.

As a verb low

is to depress; to lower.

As a noun degree

is a step on a set of stairs; the rung of a ladder.

As an adjective lowish is

somewhat low, sort of low, low to a degree.

As an adjective legal

is legal, lawful.

As a verb legalise is

.

As an adjective illegal

is illegal; not permitted by law.

As a verb legalise is

.

As adjectives the difference between mobile and nonmobile

is that mobile is capable of being moved while nonmobile is not mobile; incapable of motion.

As a noun mobile

is a sculpture or decorative arrangement made of items hanging so that they can move independently from each other (Wikipedia).

As a proper noun Mobile

is a city in southwest Alabama.

Nonmobility is a derived term of nonmobile.

As an adjective nonmobile is

not mobile; incapable of motion.

Sessile is a see also of nonmobile.

As adjectives the difference between sessile and nonmobile

is that sessile is (zoology) permanently attached to a substrate; not free to move about; “an attached oyster” while nonmobile is not mobile; incapable of motion.

As a verb intersect

is to cut into or between; to cut or cross mutually; to divide into parts.

As an adjective nonintersecting is

not intersecting.

Nonintersection is a related term of nonintersecting.

As a noun nonintersection

is lack of intersection; failure to intersect.

As an adjective nonintersecting is

not intersecting.

Nonhydrolysable is an alternative form of nonhydrolyzable.

As an adjective nonhydrolyzable is

(chemistry) not susceptible to hydrolysis.