surveil

As a verb surveil

is (nonstandard) to keep someone or something under surveillance.

As a noun null is

zero, nil; the cardinal number before einn.

As verbs the difference between observe and surveil

is that observe is while surveil is (nonstandard) to keep someone or something under surveillance.

is likely misspelled.

has no English definition.

As a verb surveil

is to keep someone or something under surveillance.

As a noun taxonomy

is the science or the technique used to make a classification.

As a verb surveil is

(nonstandard) to keep someone or something under surveillance.

As a verb surveil

is (nonstandard) to keep someone or something under surveillance.

As a proper noun monitor is

any of several publications eg the "christian science monitor".