As a noun bulldog is

a breed of dog developed in england by the crossing of the bullbaiting dog and the pug to produce a ladies companion dog having a very smooth coat, a flattened face, wrinkly cheeks, powerful front legs and smaller hind legs.

As a verb bulldog is

to chase (a steer) on horseback and wrestle it to the ground by twisting its horns (as a rodeo performance).

As a noun bulldog is

a breed of dog developed in england by the crossing of the bullbaiting dog and the pug to produce a ladies companion dog having a very smooth coat, a flattened face, wrinkly cheeks, powerful front legs and smaller hind legs.

As a verb bulldog is

to chase (a steer) on horseback and wrestle it to the ground by twisting its horns (as a rodeo performance).

As a noun bulldog is

a breed of dog developed in england by the crossing of the bullbaiting dog and the pug to produce a ladies companion dog having a very smooth coat, a flattened face, wrinkly cheeks, powerful front legs and smaller hind legs.

As a verb bulldog is

to chase (a steer) on horseback and wrestle it to the ground by twisting its horns (as a rodeo performance).

In transitive terms the difference between renew and modify

is that renew is to begin again; to recommence while modify is to make partial changes to.

As nouns the difference between cultivation and breeding

is that cultivation is the art or act of cultivating; improvement of land for or by agriculture while breeding is the process through which propagation, growth or development occurs.

As an adjective breeding is

of, relating to or used for breeding.

As a verb breeding is

present participle of lang=en.

As adjectives the difference between cheapest and economical

is that cheapest is superlative of cheap while economical is careful with money so as not to spend too much; prudent; thrifty.

As a verb guess is

to reach a partly (or totally) unqualified conclusion.

As a noun guess is

a prediction about the outcome of something, typically made without factual evidence or support.

As a noun example is

something that is representative of all such things in a group.

As a verb example is

to be illustrated or exemplified (by).

In lang=en terms the difference between unauthorize and tree

is that unauthorize is to disown the authority of; to repudiate while tree is to place upon a tree; to fit with a tree; to stretch upon a tree.

As verbs the difference between unauthorize and tree

is that unauthorize is to disown the authority of; to repudiate while tree is to chase (an animal or person) up a tree.

As a noun 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).

As nouns the difference between cytostome and cytoproct

is that cytostome is a cellular organelle found only in certain protozoa; it is specialized for phagocytosis, and usually has the form of a microtubule-supported funnel or groove while cytoproct is the anal opening in a unicellular organism.