Intercross and Tack on

Intercross noun - An offspring of parents with different genes especially when of different races, breeds, species, or genera.

Tack on and intercross are semantically related. In some cases you can use "Tack on" instead a verb "Intercross".

Tack on verb - To join (something) to a mass, quantity, or number so as to bring about an overall increase.

Intercross and tack on are semantically related. Sometimes you can use "Intercross" instead a verb "Tack on".