observes

As verbs the difference between observes and indicates

is that observes is while indicates is (indicate).

As verbs the difference between researches and observes

is that researches is third person singular simple present of to research while observes is .

As a noun researches

is (rare).

As a noun spectator

is one who observes an event; an observer.

As a verb observes is

.

As verbs the difference between notices and observes

is that notices is (notice) while observes is .

As a noun notices

is .

As verbs the difference between observes and invest

is that observes is while invest is (dated) to clothe or wrap (with garments).

As a noun invest is

(meteorology) an unnamed tropical weather pattern "to investigate" for development into a significant (named) system