As verbs the difference between insist and keep

is that insist is to hold up a claim emphatically while keep is to continue in (a course or mode of action); not to intermit or fall from; to maintain.

As a noun keep is

(obsolete) care, notice.

As a noun merger

is the act or process of merging two or more parts into a single unit.

As a verb emerge is

.

As verbs the difference between changed and exchanged

is that changed is (change) while exchanged is (exchange).

As nouns the difference between first and st

is that first is ridge (of roof) while st is .

As adjectives the difference between insidious and sick

is that insidious is producing harm in a stealthy, often gradual, manner while sick is in poor health.

As a noun sick is

sick people in general as a group.

As a verb sick is

to vomit or sick can be (rare).

As a noun hooch

is (north america|informal) alcoholic liquor, especially inferior or illicit whisky or hooch can be a thatched hut, chu, or any simple dwelling.

As a proper noun rolanda is

(rare).

As a verb hiking

is .

As a noun hiking

is walking in the countryside for pleasure or sport.

As a proper noun tour is

(cycling) the tour de france.

As nouns the difference between mosque and mask

is that mosque is a place of worship for Muslims, often having at least one minaret; a masjid while mask is a cover, or partial cover, for the face, used for disguise or protection.

As a verb mask is

to cover, as the face, by way of concealment or defense against injury; to conceal with a mask or visor.

As nouns the difference between orchestra and decoration

is that orchestra is (music) a large group of musicians who play together on various instruments, usually including some from strings, woodwind, brass and/or percussion; the instruments played by such a group while decoration is decoration.

As nouns the difference between barbecue and boil

is that barbecue is a fireplace or pit for grilling food, typically used outdoors and traditionally employing hot charcoal as the heating medium while boil is a localized accumulation of pus in the skin, resulting from infection or boil can be the point at which fluid begins to change to a vapour.

As verbs the difference between barbecue and boil

is that barbecue is to cook food on a barbecue; to smoke it over indirect heat from high-smoke fuels while boil is to heat (a liquid) to the point where it begins to turn into a gas.