🔹 Denominal Nouns Ending in -ío

The suffix -ío forms mainly masculine nouns with a collective or intensive meaning. It can indicate:

• a large group or accumulation: gente → gentío;
• a collective of people: mujer → mujerío, monje → monjío;
• an intensification of a quality such as power or authority: poder → poderío.

The RAE explicitly defines -ío as forming nouns 'with collective or intensive value' and gives mujerío, gentío, monjío and poderío as examples.

This is a small paradigm, so it is better not to manufacture additional examples. Ordered approximately by contemporary frequency: