Meaning: If there's an abundance of something, there's a profusion of it.
It is the state of being in abundance or having a large, lavish supply.
Example: The room was decorated with profusion of red roses.
Synonyms: Abundance, Glut, Outpouring, Excess, Ampleness
Antonyms: Lack, Moderation, Poorness, Scarcity

Meaning: Abstain means to restrain oneself from doing or enjoying something.
In simple words, abstain is choosing to not do something.
Example: You should abstain from drinking alcohol.
Synonyms: Refrain, Forgo, Cease, Shun, Withhold
Antonyms: Allow, Do, Indulge, Embrace, Use

Meaning: Impediment is an obstacle or something that prevents action.
An impediment is anything that slows or blocks progress.
Example: They needlessly put an impediment in the way of development.
Synonyms: Barrier, Burden, Difficulty, Handicap
Antonyms:Aid, Advantage, Assistance, Help

Meaning: Abridge means to reduce or condense the size or scope.
Example: Abridged version of this text is available on Careerride.com.
Synonyms: Shorten, Truncate, Curtail, Abbreviate
Antonyms: Expand, Extend, Increase, Lengthen