1. (noun) the act of pairing a male and female for reproductive purposes

• conjugation
• coupling
• mating
• sexual union
• union

1. (noun) the act of pairing a male and female for reproductive purposes

• assortative mating
• cross
• crossbreeding
• crossing
• hybridisation
• hybridization
• hybridizing
• interbreeding
• disassortative mating
• inbreeding
• service
• servicing

2. (noun) the act of grouping things or people in pairs

• buddy system
• match-up
• matchup

1. (noun) the act of pairing a male and female for reproductive purposes

• sex
• sex activity
• sexual activity
• sexual practice

2. (noun) the act of grouping things or people in pairs

• grouping

1. (noun) the act of pairing a male and female for reproductive purposes

• conjugate
• copulate
• copulate
• copulate
• couple
• couple
• couple
• mate
• mate
• mate
• pair
• pair
• pair

2. (noun) the act of grouping things or people in pairs

• couple
• pair
• pair off
• partner off