As nouns the difference between circle and masyu

is that circle is (lb) a two-dimensional geometric figure, a line, consisting of the set of all those points in a plane that are equally distant from another point while masyu is (games|puzzles) a logic puzzle in which the player must link circles on a rectangular grid so as to form a continuous loop that passes once through every circle.

As a verb circle

is to travel around along a curved path.

As an adjective rectangular

is having a shape like a rectangle.

As a noun masyu is

a logic puzzle in which the player must link circles on a rectangular grid so as to form a continuous loop that passes once through every circle.

As nouns the difference between grid and masyu

is that grid is (disease|obsolete) gay-related immunodeficiency — former name of aids while masyu is (games|puzzles) a logic puzzle in which the player must link circles on a rectangular grid so as to form a continuous loop that passes once through every circle.

As an adjective continuous

is without break, cessation, or interruption; without intervening time.

As a noun masyu is

(games|puzzles) a logic puzzle in which the player must link circles on a rectangular grid so as to form a continuous loop that passes once through every circle.

As nouns the difference between hormone and calorigenesis

is that hormone is while calorigenesis is (biochemistry) the production of heat via the digestion of food, or by the action of certain hormones.

As an adjective ticklish

is sensitive or susceptible to being tickled.

As an adverb ticklishly is

in a ticklish way.

As a noun race

is a contest between people, animals, vehicles, etc. where the goal is to be the first to reach some objective. Several horses run in a horse race, and the first one to reach the finishing post wins.

As a verb race

is to take part in a race (in the sense of a contest).

As an adjective monoracial is

of a single race (ethnicity).

As nouns the difference between antiretroviral and raltegravir

is that antiretroviral is (medicine|pharmacology) an agent that combats retroviruses while raltegravir is an antiretroviral drug, an integrase inhibitor, used to treat hiv infection.

As an adjective antiretroviral

is that combats infection by retroviruses.

As nouns the difference between drug and raltegravir

is that drug is (pharmacology) a substance used to treat an illness, relieve a symptom, or modify a chemical process in the body for a specific purpose or drug can be (obsolete) a drudge while raltegravir is an antiretroviral drug, an integrase inhibitor, used to treat hiv infection.

As a verb drug

is to administer intoxicating drugs to, generally without the recipient's knowledge or consent or drug can be (drag).

As nouns the difference between integrase and raltegravir

is that integrase is (enzyme) any enzyme that integrates viral dna into that of an infected cell while raltegravir is an antiretroviral drug, an integrase inhibitor, used to treat hiv infection.