Unsuccessful is a related term of unavailing.

As adjectives the difference between unsuccessful and unavailing

is that unsuccessful is failed, not successful while unavailing is useless, fruitless, futile.

As adjectives the difference between attentive and concerned

is that attentive is paying attention; noticing, watching, listening, or attending closely while concerned is showing concern.

As a verb concerned is

past tense of concern.

Liking is a related term of leaning.

As nouns the difference between liking and leaning

is that liking is likeness while leaning is a tendency.

As a verb leaning is

.

As nouns the difference between curtailment and diminishing

is that curtailment is the act of curtailing while diminishing is a diminishment.

As an adjective diminishing is

becoming smaller.

As a verb diminishing is

present participle of lang=en.

Intensity is a related term of thrill.

As nouns the difference between intensity and thrill

is that intensity is the quality of being intense while thrill is a trembling or quivering, especially one caused by emotion.

As a verb thrill is

(ergative) to suddenly excite someone, or to give someone great pleasure; to (figuratively) electrify; to experience such a sensation.

Clank is a related term of ring.

As nouns the difference between clank and ring

is that clank is a loud, hard sound of metal hitting metal while ring is ring (a place where some sports take place; as, a boxing ring) .

As a verb clank

is to make a clanking sound.

Tube is a related term of sewer.

As a verb tube

is .

As a noun sewer is

a pipe or system of pipes used to remove human waste and to provide drainage or sewer can be a servant attending at a meal, responsible for seating arrangements, serving dishes etc or sewer can be one who sews.

As adjectives the difference between compelling and lofty

is that compelling is requiring urgent attention while lofty is high, tall, having great height or stature.

As a verb compelling

is present participle of lang=en.

As nouns the difference between society and guild

is that society is a long-standing group of people sharing cultural aspects such as language, dress, norms of behavior and artistic forms while guild is a group of tradespeople made up of merchants, craftspeople, or artisans, particularly in the Middle Ages.

As nouns the difference between extremity and brink

is that extremity is the most extreme or furthest point of something while brink is the edge, margin, or border of a steep place, as of a precipice; a bank or edge, as of a river or pit; a verge; a border; as, the brink of a chasm. Also used figuratively.