Lifeless is a related term of commonplace.

As adjectives the difference between lifeless and commonplace

is that lifeless is inanimate; having no life while commonplace is ordinary; having no remarkable characteristics.

As a noun commonplace is

a platitude or.

As a verb commonplace is

to make a commonplace book.

Impressive is a related term of substantial.

As adjectives the difference between impressive and substantial

is that impressive is making, or tending to make, an impression; having power to impress; adapted to excite attention and feeling, to touch the sensibilities, or affect the conscience; as, an impressive discourse; an impressive scene while substantial is having to substance; actually existing; real; as, substantial life.

As a noun substantial is

anything having substance; an essential part.

Quaint is a related term of capricious.

As adjectives the difference between quaint and capricious

is that quaint is (obsolete) of a person: cunning, crafty while capricious is impulsive and unpredictable; determined by chance, impulse, or whim.

As a noun quaint

is (archaic) the vulva.

Rough is a related term of delinquent.

As verbs the difference between rough and delinquent

is that rough is to create in an approximate form while delinquent is .

As an adjective rough

is having a texture that has much friction not smooth; uneven.

As a noun rough

is the unmowed part of a golf course.

As an adverb rough

is in a rough manner; rudely; roughly.

Cheer is a synonym of reassurance.

As nouns the difference between cheer and reassurance

is that cheer is land, country, state, territory, shore while reassurance is reinsurance.

As nouns the difference between significance and cause

is that significance is the extent to which something matters; importance while cause is the source of, or reason for, an event or action; that which produces or effects a result.

As a verb cause is

to set off an event or action.

Belief is a related term of consideration.

As nouns the difference between belief and consideration

is that belief is mental acceptance of a claim as likely true while consideration is consideration (the process of considering).

As adjectives the difference between intense and enormous

is that intense is strained; tightly drawn while enormous is   Deviating from the norm; unusual, extraordinary.

Blockhead is a related term of duffer.

As nouns the difference between blockhead and duffer

is that blockhead is (colloquial) a stupid person while duffer is (male) dove, cock pigeon.

Indefensible is a related term of unbearable.

As adjectives the difference between indefensible and unbearable

is that indefensible is not defensible; not capable of being defended; vulnerable while unbearable is so unpleasant or painful as to be unendurable.