As nouns the difference between drug and thiopental

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 thiopental is a particular barbiturate drug.

As a verb drug

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

Thiopental is a synonym of thiopentone.

As nouns the difference between thiopentone and thiopental

is that thiopentone is thiopental while thiopental is a particular barbiturate drug.

As nouns the difference between fountainhead and headspring

is that fountainhead is a spring that is the source of a river while headspring is a fountainhead; a source.

As nouns the difference between source and headspring

is that source is the person, place or thing from which something (information, goods, etc) comes or is acquired while headspring is a fountainhead; a source.

As a verb source

is (chiefly|us) to obtain or procure:.

As nouns the difference between singing and vocalism

is that singing is the act of using the voice to produce musical sounds; vocalizing while vocalism is speaking or singing.

As an adjective singing

is (music) smooth and flowing.

As a verb singing

is .

As nouns the difference between vowel and vocalism

is that vowel is (phonetics) a sound produced by the vocal cords with relatively little restriction of the oral cavity, forming the prominent sound of a syllable while vocalism is speaking or singing.

As a proper noun sound

is the strait that separates zealand (an island of denmark) from scania (part of sweden); also sometimes called by the danish name,.

As a noun vocalism is

speaking or singing.

As an adjective toxic

is having a chemical nature that is harmful to health or lethal if consumed or otherwise entering into the body in sufficient quantities.

As an adverb toxically is

in a toxic manner.

As a noun toxin

is a toxic or poisonous substance produced by the biological processes of biological organisms.

As an adverb toxically is

in a toxic manner.

As nouns the difference between hit and multihit

is that hit is a blow; a punch; a striking against; the collision of one body against another; the stroke that touches anything while multihit is multiple hits (simultaneously, or on the same target.

As a verb hit

is To strike.

As a pronoun hit

is it.