As a preposition per

is for.

As an adjective terdiurnal is

three times per day.

As adjectives the difference between day and terdiurnal

is that day is thick, deep, dense while terdiurnal is three times per day.

As a proper noun earth

is the third planet in order from the sun, upon which humans live represented in astronomy and astrology by.

As an adjective terraceous is

resembling earth (soil, dirt).

As a noun soil

is (uncountable) a mixture of sand and organic material, used to support plant growth or soil can be (uncountable|euphemistic) faeces or urine etc when found on clothes or soil can be a wet or marshy place in which a boar or other such game seeks refuge when hunted.

As a verb soil

is to make dirty or soil can be to feed, as cattle or horses, in the barn or an enclosure, with fresh grass or green food cut for them, instead of sending them out to pasture; hence (such food having the effect of purging them), to purge by feeding on green food.

As an adjective terraceous is

resembling earth (soil, dirt).

As a noun dirt

is soil or earth.

As a verb dirt

is to make foul or filthy; soil; befoul; dirty.

As an acronym DIRT

is Deposit Interest Retention Tax

As an adjective terraceous is

resembling earth (soil, dirt.

Earthen is a synonym of terraceous.

As adjectives the difference between earthen and terraceous

is that earthen is made of earth or mud while terraceous is resembling earth (soil, dirt).

Earthy is a synonym of terraceous.

As adjectives the difference between earthy and terraceous

is that earthy is resembling dirt or soil (ie earth) while terraceous is resembling earth (soil, dirt).

Terroriser is an alternative form of terrorizer.

As nouns the difference between terroriser and terrorizer

is that terroriser is while terrorizer is someone who terrorizes, who induces terror, a terror.

As a verb terrorize

is (american spelling).

As a noun terrorizer is

someone who terrorizes, who induces terror, a terror.

As a verb induce

is to lead by persuasion or influence; incite.

As a noun terrorizer is

someone who terrorizes, who induces terror, a terror.