As nouns the difference between gazebo and lookout

is that gazebo is a belvedere, either a type of summer-house or a roofed, detached porch-like structure, usually in a yard, park or lawn while lookout is a vantage point with a view of the surrounding area.

As nouns the difference between engagement and betrothed

is that engagement is engagement while betrothed is .

As a verb betrothed is

(betroth).

As nouns the difference between conversancy and proficiency

is that conversancy is the condition of being conversant while proficiency is ability, skill, competence.

As nouns the difference between sierras and mountains

is that sierras is plural of sierra while mountains is plural of lang=en.

As nouns the difference between agglutination and precipitation

is that agglutination is the act of uniting by glue or other tenacious substance; the state of being thus united; adhesion of parts while precipitation is precipitation, unwise or rash rapidity; sudden haste.

As adjectives the difference between experimental and applied

is that experimental is experimental while applied is put into practical use.

As a verb applied is

(apply).

As adjectives the difference between transferable and exchangeable

is that transferable is transferable (able to be transferred) while exchangeable is able to be exchanged.

As nouns the difference between steppe and canyon

is that steppe is the grasslands of Eastern Europe and Asia. Similar to (North American) prairie and (African) savannah while canyon is a valley, especially a long, narrow, steep valley, cut in rock by a river.

As nouns the difference between freshman and senior

is that freshman is (obsolete) a novice; one in the rudiments of knowledge while senior is .

As an adjective senior is

.

As a phrase kiss

is .

As a noun slap is

a blow, especially one given with the open hand, or with something broad and flat.

As a verb slap is

to give a slap.

As an adverb slap is

exactly, precisely.