squatter (n.)

• arriviste
• colonial
• colonist
• colonizer
• emigrant
• greenhorn
• hirer
• homesteader
• immigrant
• incumbent
• intruder
• leaseholder
• lessee
• lodger
• nester
• newcomer
• occupant
• occupier
• parvenu
• pioneer
• planter
• precursor
• recruit
• renter
• resident
• rookie
• roomer
• settler
• sooner
• stowaway
• tenant
• tenderfoot
• upstart