As nouns the difference between double and lookalike

is that double is while lookalike is someone who physically resembles (looks like) someone else.

As a letter d

is the fourth letter of the.

As a numeral d

is cardinal number five hundred (500).

As a symbol d

is deuterium, when it needs to be distinguished from ordinary hydrogen.

As a verb da is

to give.

As a noun inconvenience

is the quality of being inconvenient.

As a verb inconvenience

is to bother; to discomfort.

As an adverb unfortunately is

happening through bad luck, or because of some unfortunate event.

As nouns the difference between dialog and language

is that dialog is dialogue while language is (lb) a body of words, and set of methods of combining them (called a grammar), understood by a community and used as a form of communication or language can be a languet, a flat plate in or below the flue pipe of an organ.

As a verb language is

to communicate by language; to express in language.

In military terms the difference between fulcrum and foothold

is that fulcrum is nATO code name for the Soviet MiG-29 aircraft while foothold is airhead, beachhead, bridgehead, lodgement.

As a proper noun Fulcrum

is nATO code name for the Soviet MiG-29 aircraft.

As adjectives the difference between tailormade and detailed

is that tailormade is (of clothes) made by a tailor while detailed is characterized by attention to detail and thoroughness of treatment.

As a verb detailed is

(detail).

As nouns the difference between vanity and cow

is that vanity is that which is vain, futile, or worthless; that which is of no value, use or profit while cow is a female domesticated ox or other bovine, especially an adult after she has had a calf.

As a verb cow is

to intimidate; to daunt the spirits or courage of. Found primarily in the passive voice.

As an acronym COW is

acronym of w:Copy-on-write|copy-on-write|lang=en.