tephra

As nouns the difference between epicenter and tephra

is that epicenter is (us) while tephra is tephra, pyroclast.

Tephra is a hypernym of lapilli.

As nouns the difference between tephra and lapilli

is that tephra is tephra, pyroclast while lapilli is a sphere shaped droplet of molten lava ejected from a volcanic eruption which falls to earth while still at least partially molten, ranging in size from 2 to 64 millimeters.

As nouns the difference between tephra and stratovolcano

is that tephra is tephra, pyroclast while stratovolcano is (vulcanology) a tall conical volcano, composed of layers (or strata) of hardened lava, tephra and ash.

As nouns the difference between tuff and tephra

is that tuff is (rock) a light porous rock, now especially a rock composed of compacted volcanic ash varying in size from fine sand to coarse gravel while tephra is (geology) the solid material thrown into the air by a volcanic eruption that settles on the surrounding areas.

As an adjective tuff

is older and simplified spelling of tough.

As nouns the difference between settle and tephra

is that settle is (archaic) a seat of any kind while tephra is (geology) the solid material thrown into the air by a volcanic eruption that settles on the surrounding areas.

As a verb settle

is to place in a fixed or permanent condition; to make firm, steady, or stable; to establish; to fix; especially, to establish in life; to fix in business, in a home etc.

As nouns the difference between eruption and tephra

is that eruption is a violent ejection, such as the spurting out of lava from a volcano while tephra is (geology) the solid material thrown into the air by a volcanic eruption that settles on the surrounding areas.

As an adjective volcanic

is of or pertaining to a volcano or volcanoes; as, volcanic heat.

As a noun tephra is

(geology) the solid material thrown into the air by a volcanic eruption that settles on the surrounding areas.

As nouns the difference between air and tephra

is that air is (uncountable|historical|astrology|alchemy|science) the atmospheric substance above the surface of the earth which animals breathe, formerly considered to be a single substance, one of the four basic elements of ancient philosophy and one of the five basic elements of eastern traditions while tephra is (geology) the solid material thrown into the air by a volcanic eruption that settles on the surrounding areas.

As a verb air

is to bring (something) into contact with the air, so as to freshen or dry it.