Adverse, Antagonistic, Counter and Counteractive all mean so opposed as to cause interference, often harmful or fatal interference. All four may be applied to one thing that comes into conflict with another.
Adventurous vs Venturesome vs Daring vs Daredevil vs Rash vs Reckless vs Foolhardy
Adventurous, Venturesome, Daring, Daredevil, Rash, Reckless and Foolhardy denote in common courting danger or exposing oneself to danger in a greater degree than is required for courage.
Adventure vs Enterprise vs Quest
Adventure, Enterprise and Quest denote an undertaking, an exploit, or an experience involving hazards and requiring boldness.
Advantage vs Handicap vs Allowance vs Odds vs Edge
Advantage, Handicap, Allowance, Odds and Edge denote a factor or set of factors in a competition or rivalry giving one person or side a position of superiority over the other.
Advancement vs Preferment vs Promotion vs Elevation
Advancement, Preferment, Promotion and Elevation designate the act of raising a person in grade, rank, or dignity, or the honor that comes to one who is so raised.
Advance vs Progress
Advance and progress both as intransitive verbs and as nouns share the meaning to move (or movement) forward in space, in time, or in approach to a material or ideal objective. They are often employed interchangeably; however there are instances in which one is preferable to the other.
Advance vs Promote vs Forward vs Further
Advance, promote, forward and further all mean to move or put ahead, but they come into comparison chiefly when they imply help in moving or putting (something) ahead.
Adultery vs Fornication vs Incest
Adultery, fornication and incest designate forms of illicit sexual intercourse which are clearly distinguished in legal use, both civil and ecclesiastical.
Adulterate vs Sophisticate vs Load vs Weight vs Doctor
Adulterate, sophisticate, load, weight and doctor mean to alter fraudulently especially for profit.
Adorn vs Decorate vs Ornament vs Embellish vs Beautify vs Deck vs Bedeck vs Garnish
Adorn, decorate, ornament, embellish, beautify, deck, bedeck and garnish all mean to add something unessential in order to enhance the appearance.
Adore vs Worship vs Idolize
Adore, worship and idolize in their nonreligious senses mean to love or admire excessively.
Adopt vs Embrace vs Espouse
Adopt, embrace and espouse mean in common to make one's own what in some fashion one owes to another.