mas·ter·y (m
s
t
-r
)
n. pl. mas·ter·ies 1. Possession of consummate skill.
2. The status of master or ruler; control: mastery of the seas.
3. Full command of a subject of study: Her mastery of economic theory impressed the professors.
and
com·pe·tence (k
m
p
-t
ns)
n.1. a. The state or quality of being adequately or well qualified; ability. See Synonyms at
ability.
b. A specific range of skill, knowledge, or ability.
2. Law The quality or condition of being legally qualified to perform an act.
3. Sufficient means for a comfortable existence.
4. Microbiology The ability of bacteria to be genetically transformable.
5. Medicine The ability to respond immunologically to bacteria, viruses, or other antigenic agents.
6. Linguistics The knowledge that enables one to produce and comprehend a language.
Wow ... all that in 20 hours or less!