As a noun countersign

is a second signature added to a document to affirm the validity of the signature of the first person.

As a verb countersign

is to sign on the opposite side of (an instrument or writing).

As an adjective undefined is

lacking a definition or value.

As a noun coacher

is person who coaches; a coach.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between journal and brochure

is that journal is while brochure is a booklet of printed informational matter, like a pamphlet, often for promotional purposes.

As adjectives the difference between tingly and undefined

is that tingly is producing tingles or tingling sensations while undefined is lacking a definition or value.

As a noun petrifaction

is the condition of being petrified.

As an adjective undefined is

lacking a definition or value.

As adjectives the difference between tinkly and undefined

is that tinkly is with a tinkling sound while undefined is lacking a definition or value.

As a verb tinkle

is to make light metallic sounds, rather like a very small bell.

As a noun tinkle

is a light metallic sound, resembling the tinkling of bells or wind chimes.

As an adjective undefined is

lacking a definition or value.

As a proper noun web

is (possibly|informal|outside|attributive use) the world wide web.

As an adjective undefined is

lacking a definition or value.

As a noun stimulation

is a pushing or goading toward action.

As an adjective undefined is

lacking a definition or value.

As adjectives the difference between sickly and undefined

is that sickly is frequently ill; often in poor health; given to becoming ill while undefined is lacking a definition or value.

As a verb sickly

is to make sickly.

As an adverb sickly

is in a sick manner.