As verbs the difference between underwhelm and disappoint

is that underwhelm is to fail to impress; to perform disappointingly while disappoint is to displease by e.g. underperforming.

As verbs the difference between tune and modify

is that tune is to modify a musical instrument so that it produces the correct pitches while modify is to make partial changes to.

As a noun tune

is a melody.

As a verb compare

is .

As an adjective relative is

connected to or depending on something else; comparative.

As a noun relative is

someone in the same family; someone connected by blood, marriage, or adoption.

As a noun denial

is (logic) the negation in logic.

As a verb denying is

.

As a verb god

is .

As nouns the difference between stereoisomers and enantiomers

is that stereoisomers is while enantiomers is .

As adjectives the difference between sigmatropic and electrolytic

is that sigmatropic is describing any rearrangement reaction in which single bonds are broken and others are formed while electrolytic is of, relating to, or using electrolysis.

As nouns the difference between brashness and trackback

is that brashness is the characteristic of being brash while trackback is a method to keep track of links to content, especially blog entries.

As a proper noun TrackBack is

a protocol for a system that allows a blogger to see who has seen the original post and has written another entry concerning it.

In uncountable terms the difference between charity and society

is that charity is   Benevolence to others less fortunate than ourselves; the providing of goods or money to those in need while society is high society.

In countable terms the difference between charity and society

is that charity is   An organization, the objective of which is to carry out a charitable purpose while society is the sum total of all voluntary interrelations between individuals.

As nouns the difference between charity and society

is that charity is   Christian love; representing God's love of man, man's love of God, or man's love of his fellow-men while society is a long-standing group of people sharing cultural aspects such as language, dress, norms of behavior and artistic forms.

As a proper noun Charity

is {{given name|female|from=English}}.

As adjectives the difference between oldish and elderly

is that oldish is somewhat old while elderly is old; having lived for relatively many years.

As a noun elderly is

an elderly person.