Bipennate is a related term of unipennate.

In medicine anatomy zoology terms the difference between unipennate and bipennate

is that unipennate is of, pertaining to, or having the nature of a muscle, the parallel fibres of which attach to a tendon at an acute angle (as a feather that is barbed on one side) while bipennate is of, pertaining to, or having the nature of a muscle, the fibres of which attach to a tendon on two sides (as a feather barbed on both sides).

As adjectives the difference between special and superspecial

is that special is special while superspecial is extremely special.

As a noun superspecial is

(media) an especially large or spectacular mass-media special, such as on television.

As a noun pass

is pass (between mountains ).

As a verb underthrow is

to throw a pass that falls short of the receiver.

As a noun receiver

is a person who or thing that receives or is intended to receive something.

As a verb underthrow is

to throw a pass that falls short of the receiver.

As an adverb exceedingly

is to a vastly great extent or degree.

As an adjective ultrathick is

extremely or exceedingly thick.

As adjectives the difference between thick and ultrathick

is that thick is relatively great in extent from one surface to the opposite in its smallest solid dimension while ultrathick is extremely or exceedingly thick.

As an adverb thick

is in a thick manner.

As a noun thick

is the thickest, or most active or intense, part of something.

As a verb thick

is (archaic|transitive) to thicken.

Superthick is a related term of ultrathick.

As adjectives the difference between superthick and ultrathick

is that superthick is very thick while ultrathick is extremely or exceedingly thick.

Hyperthick is a related term of ultrathick.

As adjectives the difference between hyperthick and ultrathick

is that hyperthick is very more than usually thick while ultrathick is extremely or exceedingly thick.

As an adjective skillful

is possessing skill.

As a noun superdetective is

an extremely skillful or dedicated detective.

As nouns the difference between detective and superdetective

is that detective is detective (police officer who looks for evidence) while superdetective is an extremely skillful or dedicated detective.