Drab is a related term of frumpy.

As a noun drab

is beadle, catchpole.

As an adjective frumpy is

dowdy, unkempt, or unfashionable.

Distracted is a related term of upset.

As verbs the difference between distracted and upset

is that distracted is (distract) while upset is to make (a person) angry, distressed, or unhappy.

As adjectives the difference between distracted and upset

is that distracted is having one's attention diverted; preoccupied while upset is (of a person) angry, distressed or unhappy.

As a noun upset is

(uncountable) disturbance or disruption.

Friendship is a related term of acquaintance.

In uncountable|lang=en terms the difference between friendship and acquaintance

is that friendship is (uncountable) good will while acquaintance is (uncountable) a state of being acquainted, or of having intimate, or more than slight or superficial, knowledge; personal knowledge gained by intercourse short of that of friendship or intimacy.

In countable|lang=en terms the difference between friendship and acquaintance

is that friendship is (countable) a friendly relationship, or a relationship as friends while acquaintance is (countable) a person or persons with whom one is acquainted.

As nouns the difference between friendship and acquaintance

is that friendship is (uncountable) the condition of being friends while acquaintance is (uncountable) a state of being acquainted, or of having intimate, or more than slight or superficial, knowledge; personal knowledge gained by intercourse short of that of friendship or intimacy.

Eager is a related term of devoted.

In obsolete|lang=en terms the difference between eager and devoted

is that eager is (obsolete) sharp; keen; bitter; severe while devoted is (obsolete) cursed; doomed.

As adjectives the difference between eager and devoted

is that eager is (obsolete) sharp; sour; acid while devoted is vowed; dedicated; consecrated.

As a noun eager

is (tidal bore).

As a verb devoted is

(devote).

Extent is a related term of substance.

As nouns the difference between extent and substance

is that extent is a range of values or locations while substance is physical matter; material.

As an adjective extent

is (obsolete) extended.

As nouns the difference between functioning and performance

is that functioning is action of the verb function while performance is the act of performing; carrying into execution or action; execution; achievement; accomplishment; representation by action.

As a verb functioning

is present participle of lang=en.

As an adjective functioning

is functional, working.

Certification is a related term of authorisation.

As nouns the difference between certification and authorisation

is that certification is the act of certifying while authorisation is .

Band is a related term of stroke.

As nouns the difference between band and stroke

is that band is tape while stroke is an act of.

As a verb stroke is

to move one's hand or an object (such as a broom) along (a surface) in one direction.

Lowering is a related term of sinking.

As verbs the difference between lowering and sinking

is that lowering is while sinking is .

As nouns the difference between lowering and sinking

is that lowering is the act of something being lowered while sinking is the act or process of sinking.

As an adjective lowering

is that lowers or frowns.

Equipment is a related term of array.

As nouns the difference between equipment and array

is that equipment is the act of equipping, or the state of being equipped, as for a voyage or expedition while array is clothing and ornamentation.

As a verb array is

to clothe and ornament; to adorn or attire.