Combine boiling water and chipotle chile in a small bowl; cover and let stand 30 minutes or until soft. Drain; discard stems, seeds, and membranes. Combine chile, onion, and next 6 ingredients in bowl of food processor. Process until puréed, scraping down sides of bowl occasionally. Spread 1 teaspoon chipotle mixture on each side of swordfish steaks. Set aside remaining chipotle mixture.
Heat a grill pan over medium-high heat until hot. Add fish, and grill 6 minutes on each side. Cut fish into 1-inch cubes; combine fish with remaining chipotle mixture. Set aside.
Combine salsa verde and avocado. Heat tortillas according to package directions. Spoon 2/3 cup fish mixture and 2 tablespoons salsa verde mixture into center of each tortilla. Fold tortilla in half. Serve immediately.