As a verb underlay

is (underlie) or underlay can be to lay (something) underneath something else; to put under.

As a noun underlay

is a layer (of earth, etc) that lies under another; substratum.

As an adjective undefined is

lacking a definition or value.

As a noun attention

is (label) mental focus.

As an interjection attention

is .

As an adjective undefined is

lacking a definition or value.

As a verb succeed

is to follow in order; to come next after; hence, to take the place of.

As an adjective undefined is

lacking a definition or value.

As a noun clinician

is a healthcare provider working in a clinic or hospital.

As an adjective undefined is

lacking a definition or value.

As a noun headbutt

is a sharp blow delivered by driving the head into the opponent, generally by lowering the head and charging forward or by rapidly tilting the head backward and then forward.

As a verb headbutt

is to deliver a sharp blow by driving the head into an opponent.

As an adjective undefined is

lacking a definition or value.

As a noun comfort

is contentment, ease.

As a verb comfort

is to relieve the distress or suffering of; to provide comfort to.

As an adjective undefined is

lacking a definition or value.

As a noun strap

is a long, narrow, pliable strip of leather, cloth, or the like.

As a verb strap

is to beat or chastise with a strap; to whip, to lash.

As an adjective undefined is

lacking a definition or value.

As adjectives the difference between correct and undefined

is that correct is free from error; true; the state of having an affirmed truth while undefined is lacking a definition or value.

As a verb correct

is to make something that was not valid become right to remove error.

As adjectives the difference between brittish and undefined

is that brittish is while undefined is lacking a definition or value.

As a noun obstacle

is something that impedes, stands in the way of, or holds up progress.

As a verb divert is

to turn aside from a course.