As an adverb causally is

in a causal manner.

In medicine terms the difference between palpation and auscultation

is that palpation is the act of feeling or pushing on various parts of a patient’s body to determine medical condition such as the normality of organs or the presence or absence of tumors, swelling, muscle tension, etc while auscultation is diagnosis of disorders by listening to the sounds of the internal organs, usually using a stethoscope.

As nouns the difference between nigrescence and nigrosine

is that nigrescence is the process of becoming black or dark; blackening while nigrosine is a dark blue synthetic dyestuff of the induline group.

As adjectives the difference between trite and common

is that trite is worn out; hackneyed; used so many times that it is no longer interesting or effective (often in reference to a word or phrase) while common is mutual; shared by more than one.

As nouns the difference between trite and common

is that trite is a denomination of coinage in ancient greece equivalent to one third of a stater while common is mutual good, shared by more than one.

As a verb common is

(obsolete) to communicate (something).

As nouns the difference between indication and elaboration

is that indication is act of pointing out or indicating while elaboration is drawing up, putting together, creation.

As nouns the difference between airframe and airplane

is that airframe is the main body and structure of an aircraft (without the powerplant) while airplane is (us) a powered heavier-than-air aircraft with fixed wings.

As a noun drop is

a small mass of liquid just large enough to hold its own weight via surface tension, usually one that falls from a source of liquid.

As a verb drop is

to fall in droplets (of a liquid).

As an adjective tart is

sharp to the taste; acid; sour.

As a noun tart is

a type of small open pie, or piece of pastry, containing jelly or conserve; a sort of fruit pie or tart can be (british|slang) a prostitute.

As a verb tart is

to practice prostitution.

As nouns the difference between rush and bustle

is that rush is any of several stiff aquatic or marsh plants of the genus Juncus, having hollow or pithy stems and small flowers while bustle is an excited activity; a stir.

As verbs the difference between rush and bustle

is that rush is to hurry; to perform a task with great haste while bustle is to move busily and energetically with fussiness (often followed by about).

As an adjective rush

is performed with, or requiring urgency or great haste, or done under pressure.

As a proper noun Rush

is {{surname|A=An|English occupational|from=occupations}} for someone who made things from rushes.

As nouns the difference between highway and passage

is that highway is a main, direct public road, especially a multi-lane, high speed thoroughfare connecting major population centers while passage is ; a leg of a journey.