This will be an exercise in synonyms. The more you can dream of the better you are to answer these.

Skeletal

Bony
Frame
Thin
Outline
Wire
Old

Pal

Friend
Bud
Chum
Mate
Love
Pair
Couple
Company
Fellowship
Synonym

Now figure out the rhymes for both

Skeletal Rhymes

Bone (stone, moan, phone, hone, cone, alone, tone, zone)
Frame (lame,maime,name,same,tame)
Thin (bin,chin,fin,gin,kin,pin,sin,tin,win,zin)
Outline
Wire (dire,fire,hire,sire)
Old (bold,cold,fold,gold,hold,mold,sold,told)

Look in the rhymes for a word that means a friend. we come up with kin for thin. That makes one possible pair THIN KIN

Let's do the opposite with Pal

Pal Rhymes

Bud (dud, jud, mud, sud)
Chum (bum, rum, gum, yum, sum, mum, tum, yum)
Mate (bate, date, fate, gate, hate, late, rate, sate, tate, wait) 
Love (glove, dove, move, rove, dove)
Pair (fair, hair, lair)
The following are too many syllables to do
Friend
Couple 
Company
Fellowship
Synonym

Late means dead and could mean skeletal. Perhaps "dud" means dead meaning skeletal. That would give us two possible rhymes: Dud Bud or Late Mate

Overall Reapings

THIN KIN
DUD BUD
LATE MATE