  A field-theoretic model for a highly compact object that mimicks a black hole
is found for the gravitationally interacting system of a boson star and a
global monopole which are nonminimally coupled to gravity. According to the
strength of the nonlinear gravitational effects and the gravitational
backreaction, three distinct coupling regimes are featured: weak, mild and
strong. In the strong coupling regime we show that a repulsive monopole
stabilizes an attractive boson star and the resulting configuration exhibits
large energy density, large (and negative) principal pressures, large
compactness, large effective potential, large local forces, and yet exhibits no
event horizon. As such a composite system of a boson star and a global monopole
represents a convincing microscopic candidate for a black hole mimicker.
