nosy

As a noun concern

is that which affects one's welfare or happiness.

As a verb concern

is (label) to relate or belong to; to have reference to or connection with; to affect the interest of; to be of importance to.

As an adjective nosy is

prying, inquisitive or curious in other’s affairs; tending to snoop or meddle.

As adjectives the difference between nosy and undefined

is that nosy is prying, inquisitive or curious in other’s affairs; tending to snoop or meddle while undefined is lacking a definition or value.

As a noun curiosity

is (obsolete) careful, delicate construction; fine workmanship, delicacy of building.

As an adjective nosy is

prying, inquisitive or curious in other’s affairs; tending to snoop or meddle.

As adjectives the difference between cozy and nosy

is that cozy is affording comfort and warmth; snug; social while nosy is prying, inquisitive or curious in other’s affairs; tending to snoop or meddle.

As a noun cozy

is a padded or knit covering to keep an item warm, especially a teapot or egg.

As a verb cozy

is to become snug and comfortable.

As adjectives the difference between officious and nosy

is that officious is (obsolete) obliging, attentive, eager to please while nosy is prying, inquisitive or curious in other’s affairs; tending to snoop or meddle.

As adjectives the difference between snoopy and nosy

is that snoopy is given to snooping while nosy is prying, inquisitive or curious in other’s affairs; tending to snoop or meddle.

As a proper noun Snoopy

is charlie Brown's pet beagle in the comic strip Peanuts, by Charles M. Schulz; often representing doggish soulfulness.

As adjectives the difference between nosy and telltale

is that nosy is prying, inquisitive or curious in other’s affairs; tending to snoop or meddle while telltale is revealing something not intended to be known.

As a noun telltale is

one who divulges private information with intent to hurt others.

As adjectives the difference between eager and nosy

is that eager is (obsolete) sharp; sour; acid while nosy is prying, inquisitive or curious in other’s affairs; tending to snoop or meddle.

As a noun eager

is (tidal bore).

As an adjective nosy

is prying, inquisitive or curious in other’s affairs; tending to snoop or meddle.

As a noun inquiry is

the act of inquiring; a seeking of information by asking questions; interrogation; a question or questioning.

As adjectives the difference between nosy and concerned

is that nosy is prying, inquisitive or curious in other’s affairs; tending to snoop or meddle while concerned is showing concern.

As a verb concerned is

past tense of concern.