What is another word for leech onto?
Pronunciation: [lˈiːt͡ʃ ˈɒntʊ] (IPA) 
There are several other ways to express the meaning of "leech onto" with similar words and phrases. One could say "cling onto," "attach oneself to," or "latch onto" as alternative expressions for the concept of sticking to someone or something for one's own benefit. Similarly, words like "parasitic," "dependent," or "clingy" could be used to describe a person who exhibits such behavior. On the other hand, phrases like "befriend," "partner with," or "collaborate with" could describe a more positive and mutually beneficial type of attachment. Ultimately, the choice of words will depend on the context and intended tone.
