As adjectives the difference between exact and obvious

is that exact is precisely agreeing with a standard, a fact, or the truth; perfectly conforming; neither exceeding nor falling short in any respect while obvious is easily discovered, seen, or understood; self-explanatory.

As a verb exact

is to demand and enforce the payment or performance of.

As nouns the difference between mighty and tough

is that mighty is influential, powerful beings or mighty can be (obsolete|rare) a warrior of great strength and courage while tough is a person who obtains things by force; a thug or bully.

As adjectives the difference between mighty and tough

is that mighty is very strong; possessing might while tough is strong and resilient; sturdy.

As an adverb mighty

is (colloquial) very; to a high degree.

As an interjection tough is

(slang) (used to indicate lack of sympathy).

As a verb tough is

to endure.

As an adjective disconcerting

is tending to cause discomfort, uneasiness or alarm; unsettling; troubling; upsetting.

As a verb unnerving is

.

As a verb mandate

is .

As a noun purview is

(legal) the enacting part of a statute.

As verbs the difference between exist and coexists

is that exist is to be; have existence; have being or reality while coexists is .

As adjectives the difference between comforting and calm

is that comforting is giving comfort while calm is (of a person) peaceful, quiet, especially free from anger and anxiety.

As verbs the difference between comforting and calm

is that comforting is while calm is to make calm.

As nouns the difference between comforting and calm

is that comforting is the act of giving comfort while calm is (in a person) the state of being calm; peacefulness; absence of worry, anger, fear or other strong negative emotion.

As nouns the difference between curvature and convex

is that curvature is the shape of something curved while convex is any convex body or surface.

As an adjective convex is

curved or bowed outward like the outside of a bowl or sphere or circle.

As adjectives the difference between religious and habitual

is that religious is concerning religion while habitual is behaving in a regular manner, as a habit.

As a noun religious

is a member of a religious order, ie a monk or nun.

As an adverb hereby

is (obsolete) near this place; nearby.

As an adjective false is

(label) one of two states of a boolean variable; logic.