Thyrsoid is a derived term of thyrse.

As an adjective thyrsoid

is having the approximate form of a thyrsus.

As a noun thyrse is

(botany) a type of inflorescence; a compact panicle having an obscured main axis and cymose subaxes.

As an adjective conical

is (geometry) of or relating to a cone or cones.

As a noun stratovolcano is

(vulcanology) a tall conical volcano, composed of layers (or strata) of hardened lava, tephra and ash.

As a verb lava

is to wash.

As a noun stratovolcano is

(vulcanology) a tall conical volcano, composed of layers (or strata) of hardened lava, tephra and ash.

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 an interjection ash

is argh.

As a noun stratovolcano is

(vulcanology) a tall conical volcano, composed of layers (or strata) of hardened lava, tephra and ash.

As nouns the difference between label and addressograph

is that label is a small ticket or sign giving information about something to which it is attached or intended to be attached while addressograph is a device for producing mailing labels first produced in 1893, used in much of the 20th century.

As a verb label

is to put a label (a ticket or sign) on (something).

As nouns the difference between groove and colpus

is that groove is a long, narrow channel or depression; eg, such a slot cut into a hard material to provide a location for an engineering component, a tyre groove, or a geological channel or depression while colpus is (botany|palynology) a groove sometimes occurring on grains of pollen.

As a verb groove

is to cut a groove or channel in; to form into channels or grooves; to furrow.

Plutonist is a synonym of vulcanist.

As nouns the difference between plutonist and vulcanist

is that plutonist is one who supports the geological theory of plutonism while vulcanist is someone interested in volcanism, the study of volcanoes.

In historical terms the difference between neptunism and vulcanism

is that neptunism is a discredited scientific theory of geology, held by many scientists around the late 18th century and early 19th century, that rocks were formed from the crystallisation of minerals in the early Earth's oceans while vulcanism is the belief, held mostly in the 18th century, that rocks were formed in fire. This theory was a rival theory to Neptunism.

As a noun vulcanism is

an alternative spelling of lang=en.

Plutonism is a synonym of vulcanism.

As nouns the difference between plutonism and vulcanism

is that plutonism is the old geological theory that the rocks forming the earth were formed in fire by volcanic activity, with a continuing gradual process of weathering and erosion, then deposited on the sea bed, re-formed into layers of sedimentary rock by heat and pressure, and raised again while vulcanism is .