noun

1. A mutual fund.

2. A mutual organization.

3. Either of a pair of people who follow each other's social media accounts.

adjective

1. Having the same relationship, each to each other.

   “They were mutual enemies.”

2. Collective, done or held in common.

   “Mutual insurance.”

3. Reciprocal.

   “They had mutual fear of each other.”

Synonyms: mutual, shared, reciprocative