Some high frequency Homonyms

List of homonyms can be found here.

16 June 2012 (GPL site)

attenuate - reduce the signal strength

atypical - unusual

audacity - boldness
(syn. - bravery, impudence, brazenness, nerve)

augment - increase

avarice - greed
(syn. - covetousness , acquisitiveness)

avert - prevent

baleful - evil

balmy - mild

banal - meaning less, trite

baneful - poisonous

peak : Synonyms

Peak (noun)
Synonyms -  acme,aiguille, alp, apex, brow, bump, cope, crest, crown, hill, mount, mountain, pinnacle, point, roof, spike, summit, tip, vertex,

Antonyms : base, bottom, nadir

Peak (verb)
Synonyms : be at height, climax, come to a head, crest, culminate, reach the top, reach the zenith, top out
Antonyms : fall, hit bottom, plunge

Peak vs peek vs pique

peak  means 'maximize,' peek  means 'to peep or snoop,' and pique  means 'to excite or irritate'

Synonyms related to agree

Synonyms
accede, acknowledge, acquiesce, admit, allow, be of the same mind, bury the hatchet, buy into, check, clinch the deal, come to terms, comply, concede, concur, consent, cut a deal, engage, give blessing, give carte blanche, give green light, give the go-ahead, go along with, grant, make a deal, okay, pass on, permit, play ball, recognize, see eye to eye, set, settle, shake on, side with, sign*, subscribe, take one up on, yes*

Also accord means agreement. accede, acquiesce means positive agreement, while concede not necessarily means positive agreement.

 Antonyms
contend, contradict, decline, disagree, dispute, dissent, oppose, protest, refuse

* means informal usage

Assent vs consent

In legal English, consent and assent are often used interchangeably. There is a subtle difference though.
The term assent connotes a positive and voluntary agreement both as a noun and a verb.
“Assent to a proposal of marriage.”
The term consent is neutral in connotation and can apply even when the agreement is given reluctantly.
“The employee consented to the non-compete clause being included in her employment agreement.”

Principle and Principal

Principle
The word principle means a standard, a law or a rule. This means you can have:

Eg. - the principles of economics, which are the laws that govern economic theory

Principal
n legal and financial English, however, principal is often a noun (from principal person).
In the law of agency, the principal is the one on whose behalf the agent acts:  

She attended the meeting as the agent of a principal who wished to remain anonymous. 


  In banking the principal (sum) is money invested or borrowed on which interest is paid:  

The borrower was only able to make the minimum payment, which covered the interest but did not reduce the principal.

Accede and exceed

Though the pronounciation looks same, meanings are :
accede: agree, to adhere to an agreement; become party to a contract
exceed: to go beyond; surpass