1) Boost morale 2) Bring out of the dumps 3) Buck up 4) Cheer 5) Cheer near the construction 6) Cheer up 7) Embolden 8) Encourage 9) Encourage the near desperate 10) Give comfort to 11) Give encouragement to 12) Give hope to 13) Recreate 14) To give heart to Found on https://www.crosswordclues.com/clue/hearten
• (v. t.) To restore fertility or strength to, as to land. • (v. t.) To encourage; to animate; to incite or stimulate the courage of; to embolden. Found on http://thinkexist.com/dictionary/meaning/hearten/
Heart'en (härt''n) transitive verb [ From Heart .] 1. To encourage; to animate; to incite or stimulate the courage of; to embolden. « Hearten those that fight in your defense.» Shak. 2. To restore fertility or strength to, as to land. Found on http://www.encyclo.co.uk/webster/H/23