Convenient vs. Efficient — What's the Difference?

Suited or favorable to one's comfort, purpose, or needs

(of a system or machine) achieving maximum productivity with minimum wasted effort or expense

Easy to reach; accessible

(of a person) working in a well-organized and competent way

Close at hand; near

Acting or producing effectively with a minimum of waste, expense, or unnecessary effort

(Obsolete) Fitting and proper; suitable.

Acting directly to produce an effect

Serving to reduce a difficulty, or accessible with minimum difficulty; expedient.

Causing less waste or requiring less effort than comparable devices or methods. Used in combination

Suspicious due to suiting someone's purposes very well.

Making good, thorough, or careful use of resources; not consuming extra. Especially, making good use of time or energy

(obsolete) Fit; suitable; appropriate.

Expressing the proportion of consumed energy that was successfully used in a process; the ratio of useful output to total input

Fit or adapted; suitable; proper; becoming; appropriate.

Causing effects, producing results; bringing into being; initiating change (rare except in philosophical and legal expression efficient cause = causative factor or agent)

Affording accommodation or advantage; well adapted to use; handly; as, a convenient house; convenient implements or tools.

Effective, efficacious

Seasonable; timely; opportune; as, a convenient occasion; a convenient season.

(obsolete) a cause; something that causes an effect

Near at hand; easy of access.

Causing effects; producing results; that makes the effect to be what it is; actively operative; not inactive, slack, or incapable; characterized by energetic and useful activity; as, an efficient officer, power.

Suited to your comfort or purpose or needs;

An efficient cause; a prime mover.

Easy to reach;

Being effective without wasting time or effort or expense;

Large and roomy (`convenient' is archaic in this sense);

Able to accomplish a purpose; functioning effectively;