Ability means power to receive, accomplish something;
capacity means power to receive, no or contain
His capacity for Mathematics is very limited.
Advance increments are given on the basis of one’s ability.
- Accomplish, Attain
Accomplish is used with a task.
Attain with success, glory, etc.
He accomplished the task assigned to him within the prescribed period.
He attained success in all his enterprises and undertakings.
- Adapt, Adopt, Adept
Adapt means to adjust to circumstances or occasions.
Adopt mean accept.
Adept means expert.
He adapted his language to the intellectual level of his audience.
Mr. and Mrs. Samuel had no child and so they were eager to adopt someone as their heir.
He is adept in the art of photography.
- Addicted, Devoted
Addicted is used with reference to a voice.
Devoted is used with reference to pursuits or objects considered noble.
He is addicted to smoking.
He is devoted to his wife.
- Admission, Admittance
Admission means entering a club, an institution, or place of entertainment and also implies the
gaining of privileges enjoyed by the members or persons already admitted.
Admittance means entering a building.
Admission to the college will be made on the basis of merit.
He gained admittance to the University Hall by false personification.
- Adopt, Assume
You can assume a pose, a theory, a supposition, a false name or an inference;
adopt means to accept and to regard as one s own.
He adopted a wrong line of action.
You assume that he is not capable of such a mischief.
- Advent,. Arrival
Advent is used with reference to an important event.
Arrival is used with reference to a person, a vehicle or an automobile.
People hail the advent of spring by indulging in all sorts of merry-making.
The people awaited his arrival very eagerly.
- Aesthetic, Beautiful
Aesthetic is used with reference to a person and refers to a quality of mind.
Beautiful means full of beauty and has no reference to the mind.
He is gifted with an aesthetic sense.
He has a beautiful watch.
- Aggravate, Annoy
Aggravate is used with reference to disease, illness, pain, grief, or difficulties.
Annoy means to offend and is used with reference to a person only.
He aggravated his difficulties by with holding every sort of beauty and has no reference to the mind.
He has a beautiful watch.
- Alibi, Excuse
Alibi means being absent from a place at a certain time on a certain date.
Excuse means a justification for some irregularity.
The alibi plea was not accepted by the court in his case.
He has always one excuse or the other to defend his short comings.
- Allow, Permit
Allow implies absence of opposition but does not always imply approval.
whereas permit implies sanction and approval.
I can permit him to enter the premises but I don’t allow him to do so.
In Pakistan open sale of wine is not allowed.
To allude is to refer casually or incidentally.
To refer means to give definite and full information.
The speaker alluded to the interesting customs prevalent among some people in the course of his lecture.
I would refer you to Concise Oxford Dictionary.
14. Allure, Lure
Allure means to tempt a person;
whereas lure means to be tempted by some situation or action which proves harmful ultimately.
He was allured by the prospect of discovering mines of gold in the untraveled land.
She lured him to her side by her charms and made him renounce his wife.
Allusion implies indirect hint or reference to someone.
Illusions means an imaginary appearance.
This poem is full of many obscure allusions.
The doctor asked the patient if he suffered from illusions.