As a noun spoke

is a support structure that connects the axle or the hub of a wheel to the rim.

As a verb spoke

is to furnish (a wheel) with spokes.

As an adjective spoked is

having spokes.

As a noun spire

is or spire can be one of the sinuous foldings of a serpent or other reptile; a coil.

As a verb spire

is of a seed, plant etc: to sprout, to send forth the early shoots of growth; to germinate or spire can be (obsolete) to breathe.

As an adjective spired is

having a spire.

As adjectives the difference between spheroidal and spheroidical

is that spheroidal is spheroidal while spheroidical is (obsolete) spheroidal.

As nouns the difference between spermatids and spermiogenesis

is that spermatids is while spermiogenesis is (biology) the final stage of spermatogenesis it involves the maturation of the spermatids into spermatozoa.

As a noun stalactite

is (geology) a mineral deposit of calcium carbonate, in shapes similar to icicles, that hangs from the roof of a cave.

As an adjective stalactitic is

containing stalactites.

As a noun stalagmite

is (geology) a mineral deposit of calcium carbonate, in shapes similar to icicles, that lie on the ground of a cave.

As an adjective stalagmitic is

containing stalagmites.

As a noun sputter

is moist matter thrown out in small detached particles; also, confused and hasty speech.

As a verb sputter

is to spit, or to emit saliva from the mouth in small, scattered portions, as in rapid speaking.

As an adjective sputtery is

prone to sputter.

As an adjective spunky

is spirited or plucky.

As an adverb spunkily is

in a spunky manner.

As a proper noun lively

is .

As a verb sprack is

.

As a verb rust

is to grow.

As a noun ferrugo is

a disease of plants caused by fungus; rust.