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 falling barometer farthest outpost father ferment first arrival first line forefront foregoer foregoing forerunner foreshadower founder front front line front position front rank front-runner gathering clouds generator grower harbinger heading herald high sign homesteader immigrant inaugurator industrialist initiator innovationist innovator instigator institutor introducer inventor journeyman le pas leading leaven line maker manufacturer master master craftsman messenger modificator modifier mother nester omen organizer originator outguard outpost outrider past master pioneer planner planter point precedence precedency precedent preceding precession predecessor preference prefixation preliminary sign prelude premise premonitor premonitory sign premonitory symptom presager prime mover priority prodroma prodrome producer prothesis prototype quarantine flag railhead raiser realizer red flag red light scout settler shaper sire skull and crossbones smith sooner spearhead squatter storm petrel stormy petrel superiority symptom the lead thundercloud thunderhead top priority transformer transmogrifier urgency van vanguard warning sign warning signal wright yeast yellow flag yellow jack