As verbs the difference between stemming and lemmatizing

is that stemming is while lemmatizing is .

As a noun stemming

is (nautical) movement against a current, especially a tidal current.

As an interjection gesundheit

is (north america) said to someone who has just sneezed.

As a noun godspeed is

(godspeed).

As nouns the difference between tree and boom

is that tree is a large plant, not exactly defined, but typically over four meters in height, a single trunk which grows in girth with age and branches (which also grow in circumference with age) while boom is .

As a verb tree

is to chase (an animal or person) up a tree.

As an adjective pompous

is affectedly grand, solemn or self-important.

As a proper noun Pompeii is

a ruined Roman town in Italy, destroyed by Vesuvius (a volcano) in 79AD.

As a proper noun grass

is .

As a noun marijuana is

drug smoked or ingested for euphoric effect, .

As adjectives the difference between arbitrary and fixed

is that arbitrary is based on individual discretion or judgment; not based on any objective distinction, perhaps even made at random while fixed is not changing, not able to be changed, staying the same.

As a noun arbitrary

is anything arbitrary, such as an arithmetical value or a fee.

As a verb fixed is

past tense of fix.

As nouns the difference between roaster and fryer

is that roaster is one who roasts food while fryer is a container for frying food.

As nouns the difference between jealousy and greed

is that jealousy is a state of suspicious guarding towards a spouse, lover etc., from fears of infidelity while greed is a selfish or excessive desire for more than is needed or deserved, especially of money, wealth, food, or other possessions.

As nouns the difference between pizza and mouse

is that pizza is pizza while mouse is any small rodent of the genus mus .

As a verb mouse is

to move cautiously or furtively, in the manner of a mouse (the rodent) (frequently used in the phrasal verb to mouse around ).

As nouns the difference between ball and triangle

is that ball is a solid or hollow sphere, or part thereof while triangle is a polygon with three sides and three angles.

As proper nouns the difference between ball and triangle

is that ball is {{surname} while Triangle is the area comprising the cities of Raleigh, Durham and Chapel Hill in North Carolina. Used with "the" except when attributive.

As a verb ball

is to form or wind into a ball.

As an interjection ball

is an appeal by the crowd for holding the ball against a tackled player. This is heard almost any time an opposition player is tackled, without regard to whether the rules about "prior opportunity" to dispose of the ball are fulfilled.