As verbs the difference between flunk and disappoint

is that flunk is of a student, to fail a class; to not pass while disappoint is to displease by e.g. underperforming.

As verbs the difference between flunked and rejected

is that flunked is (flunk) while rejected is (reject).

As an adjective pervasive

is manifested throughout; pervading, permeating, penetrating or affecting everything.

As a verb intruding is

.

As a noun intruding is

intrusion.

As verbs the difference between appointed and designates

is that appointed is past tense of appoint while designates is third-person singular of designate.

As a noun designates is

plural of designate.

As nouns the difference between pioneer and creator

is that pioneer is one who goes before, as into the wilderness, preparing the way for others to follow while creator is something or someone which creates or makes something.

As a verb pioneer

is to go before and prepare or open a way for; to act as pioneer.

As a proper noun Creator is

a god who created the Universe.

As nouns the difference between consortium and coterie

is that consortium is an association or combination of businesses, financial institutions, or investors, for the purpose of engaging in a joint venture while coterie is a circle of people who associate with one another.

As adjectives the difference between semantic and psycholinguistic

is that semantic is of or relating to semantics or the meanings of words while psycholinguistic is pertaining to psycholinguistics.

As nouns the difference between tub and sink

is that tub is a flat-bottomed vessel, of width similar to or greater than its height, used for storing or packing things, or for washing things in while sink is a basin used for holding water for washing.

As verbs the difference between tub and sink

is that tub is to plant, set, or store in a tub while sink is to move or be moved into something .

As nouns the difference between pear and county

is that pear is an edible fruit produced by the pear tree, similar to an apple but elongated towards the stem while county is the land ruled by a count or a countess.

As an adjective county is

characteristic of a ‘county family’; representative of the gentry or aristocracy of a county.

As a proper noun apple

is a nickname for new york city, usually “the big apple”.

As a noun county is

county.