for fha approved condos, use this search engine: https://entp.hud.gov/idapp/html/condlook.cfm
Townhomes is a term that is thrown around but it's just a term that sounds better than the original term, "rowhouse". Anyways, it is used to describe both attached condos or pud's (planned unit developments). If the townhouse you are interest ed in is legally a pud, you should be okay. If it is legally a condo, you should probably try to choose one off the search engine above.