Fee simple absolute is the most complete form of ownership recognized in real property law — a life estate ends with a measuring life, a leasehold is a tenant's possessory interest rather than ownership, and an easement is only a limited right to use land someone else owns.

Fee simple is the most complete, unrestricted form of ownership recognized in real property law — it doesn't expire on a timer, it isn't a leasehold (a tenant's interest, not an owner's), and it isn't tied to someone else's lifespan, which describes a life estate instead.

Under Texas's rule of capture, a landowner generally has the right to pump and use groundwater beneath their own property — it isn't centrally state-owned in the way surface water is regulated, it doesn't automatically flow in ownership to a downstream neighbor, and groundwater and surface water are treated under distinctly different legal frameworks in Texas.

A life estate is explicitly tied to a measuring life and ends when that person dies, with the property then passing to whoever the deed named (often called the 'remainderman') — it doesn't upgrade into fee simple for the life tenant's heirs, doesn't become a leasehold, and doesn't require a separate court ruling to take effect.