Apt refers to a habitual tendency.
At a distance vs In the distance
in the distance—far away:
Attention vs Study vs Concentration vs Application
Attention, study, concentration, application can mean the direct focusing of the mind on something, especially on something to be learned, worked out, or dealt with.
Appropriate vs Apropos
Appropriate means suitable or fitting.
Attempt vs Try vs Endeavor vs Essay vs Strive vs Struggle
Attempt, try, endeavor, essay, strive, struggle as verbs mean to make an effort to do something that may or may not be successful and as nouns (the single exception in form being striving) mean the effort made to accomplish such an end.
At a clap vs In a clap
at a clap —(dated) with one effort; at once:
At a birth vs At birth vs At the birth
at a birth—during a single act of reproduction:
Attack vs Aggression vs Offense vs Offensive
Attack, aggression, offense, offensive and their corresponding adjectives attacking, aggressive, offensive denote or describe action in a struggle for supremacy which must be met with defense or by means of defenses.
Appraise vs Apprise
Appraise means to estimate, evaluate, or judge something.
Attack vs Assault vs Onslaught vs Onset
Attack, assault, onslaught and onset denote an attempt made on another or on others to injure, destroy, or defame.
Apposite vs Opposite
Apposite means appropriate, pertinent, or suitable.
Associate with someone vs Be associated with someone
associate with someone—spend a lot of time in smb.’s company (especially if that person is objectionable):