Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
head-to-head is an adjective and adverb meaning "involving two persons; intimately private". It carries 3 recorded senses.
involving two persons; intimately private
“a tete-a-tete supper”
“a head-to-head conversation”
inconclusive as to outcome; close or just even in a race or comparison or competition
“as they approached the finish line they were neck and neck”
“the election was a nip and tuck affair”
even or close in a race or competition or comparison
“the horses ran neck and neck”
“he won nip and tuck”
Definitions, synonyms and semantic relations for head-to-head come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.