advance guard
agent
airhead
alterant
alterative
alterer
ancestor
ancestors
announcer
antecedence
antecedency
antecedent
anteposition
anteriority
apprentice
architect
artificer
artist
author
avant-garde
battle line
beachhead
begetter
beginner
bridgehead
buccinator novi temporis
builder
catalyst
catalytic agent
colonial
colonist
colonizer
conceiver
constructor
craftsman
creator
danger sign
designer
deviser
discoverer
dominion
early bird
early comer
early riser
early symptom
effector
engenderer
engineer
executor
executrix
indicant
indication
material
stuff
activation
adhesion
antigen
apoptosis
beginning
depletion
differentiation
forerunner
homeostasis
hormone
infiltration
lineage
metabolism
metabolites
pathway
progenitor
receptor
subset
subtypes
synthesis
transplantation
cursor
mercer
purser
reverser
verser