Great words to use in speech/writing

complacent/complacency
profound
encapsulation (technical)
redundancy (tech)
buffering (tech)
scalability (tech)
concurrent 
bashing
assumption
synchronous/ asynchronous
sporadic
momentarily
concise
refresher
Ubiquitous
random
inevitable
mandate
necessitate
reliable
specifically
concept/feature/
lucid
approach
trade off

optimal

subtle

astounding
paradhigm shift
counter intuitive
pseudo
outpace
overwhelming
niche
isolate
capability
dynamic
pre-defined (ex: pre-defined role etc)
defunct
definitive verification
consistent
nuances
comprehensive
Magnificent
sophisticated
obsolete
ironic
ironically
alluded
overwhelm
myriad
precise
analogy
multitudes (of problems, errors etc)
flexible
on the fly
apparently
caveat
oblivious
phenomenal
silver bullet
overlap