1) Acquire 2) Cultivate again 3) Develop 4) Grow 5) Produce 6) Sprout again 7) Sprout anew 8) Verb in rogaine ads 9) What mown lawns do Found on https://www.crosswordclues.com/clue/regrow
Re·grow' intransitive verb & t. To grow again. « The snail had power to regrow them all [ horns, tongue, etc.]» A. B. Buckley. Found on http://www.encyclo.co.uk/webster/R/40