"Words like Marry" are called Reciprocal Verbs, or Predicates, or Constructions.
They refer to sets (normally couples) of agents, instead of to a single agent. Marry is prototypic.
Reciprocal predicates have unusual syntactic affordances, like the ability to swap subject and object without altering meaning.
- Bill and Sue married yesterday (dual subject, intransitive)
- Bill married Sue yesterday ~ Sue married Bill yesterday (subj~obj swap, transitive)
These meanings of marry are Inchoative -- they refer to change of state. Bill and Sue entered the state of being married, a Stative meaning. The adjective married describes the state, not the event of its inception:
- Bill and Sue are married (predicate adjective, not a passive)
- Bill is married to Sue ~ Sue is married to Bill
- Bill is married ~ Bill is a married man
- Sue is married ~ Sue is a married woman
- George is not married ~ George is an unmarried man
- George is not married to Sue vs *George is unmarried to Sue
Finally, as usual when there is a Stative and an Inchoative sense of a verb (whether reciprocal or not), there is also a Causative sense of marry, meaning 'Cause to marry', and running through all the changes of the other senses, viz
- George married Bill and Sue.
- George married Bill to Sue. ~ George married Sue to Bill.
- Sue's father married her off young (to Bill).
- The couple's parents married them off young.
To summarize, marry has
- a stative sense as a predicate adjective be married
(derived from a past participle, but without verbal powers)
- an inchoative sense meaning 'come to be/become married'
(a reciprocal verb, allowing argument-swapping)
- a causative sense meaning 'cause to become married'
(in several senses of cause, and several senses of marry)
Each one has different uses, constructions, and stigmata.