R and D
analytic
control
control experiment
controlled experiment
cupellation
cut and try
cut-and-try
empirical
empiricism
examinational
examinatorial
examining
experiment
experimental
experimental design
experimental method
experimental proof
experimentalism
experimentation
explorational
explorative
exploratory
fact-finding
feeling
groping
heuristic
hit and miss
hit-or-miss
indagative
inspectional
inspectorial
investigational
investigative
investigatory
noble experiment
pilot
pragmatism
probationary
probative
probatory
proof
proving
provisional
research and development
rule of thumb
tentative
tentative method
tentativeness
test
arresting
attesting
besting
breasting
contesting
cresting
digesting
divesting
ingesting
investing
molesting
nesting
protesting
reinvesting
requesting
resting
retesting
suggesting
vesting
wresting